Pop superstar Jason Derulo kicks off this week's Hot 5 with his brand new single 'In My Head'! Watch it along with the rest of the most watched videos of the week including music from Adam Lambert, Rihanna, Wyclef Jean, and Kid Cudi.

Adam Lambert makes his first appearance at the top of the Hot 5 with his hit ballad 'Whataya Want From Me'! Watch it now along with the other most watched videos, including music from Kid Cudi, Paramore, Jason Derulo, and Ludacris.

Kid Cudi's latest hit music video 'Pursuit of Happiness' is the most watch video on this week's Hot 5! Watch it along with the rest of the list, including music from Adam Lambert, Lil Wayne, Thirty Seconds to Mars, Phoenix, and more.

Lil Wayne strap on his electric guitar for this week's Hot 5 as his latest single 'On Fire' kicks off this week's list! Watch it now along with music from Jay-Z, Young Money, Sean Paul, Muse, and more.

Dancehall superstar Sean Paul has the first Hot 5 #1 music video of 2010! Watch the ridiculously catchy 'Hold My Hand' now, along with music from Nick Jonas & the Administration, Beyonce, Mos Def, and Rihanna.

Up and coming artist Iyaz heads up this week's Hot 5 with his hit music video 'Replay.' Watch it along with the rest of the most watched music videos of the week, including hits from Shakira, Major Lazer, Jay-Z, Boys Like Girls, and more.

Shakira gets some help from hip hop megastar Lil Wayne on her latest #1 single at the top of the Hot 5! Watch it along with the rest of the most watched videos of the week including music from Major Lazer, Jay-Z, Leona Lewis, and Paramore.

Internationally renowned, UK songstress Leona Lewis heads up the Hot 5! Watch Leona Lewis' 'Happy,' along with the rest of the most watched videos of the week, including music from Jay-Z, Alicia Keys, Shakira, and Taylor Swift.

Alicia Keys displays some super-abilities other than her voice in this week's Hot 5 on MTV! Watch her latest, along with the rest of the most watched videos of the week, including music from Lady Gaga, Anya Marina, Shakira, and Hedley.

Everyone's going Gaga for 'Bad Romance'! Check out Lady Gaga's latest hit along with the rest of the most watch music videos of the week, including fresh music from La Roux, Beyonce, Hedley, and Cobra Starship.

Boys Like Girls dominate this week's Hot 5 with their hit single 'Love Drunk.' Watch it along with the rest of the most watched videos of the week including music from Cobra Starship, Miley Cyrus, Jay-Z, and Lights.

Jay-Z's 'Empire State of Mind' solidifies it's spot as the hottest video of the week on this week's Hot 5! Check out the entire list, including music from Melanie Fiona, Jordin Sparks, the Dead Weather, and Alicia Keys.

Jordin Sparks kicks off this week's Hot 5 on MTV with her mega-hit 'Battlefield' (featured on this week's Hills)! Watch it along with the rest of the most watched videos, including music by Friendly Fires, Owl City, 3Oh!3, and Alicia Keys.

Owl City takes the top spot of the Hot 5 with their surprise hit single 'Fireflies.' Watch it along with the rest of the most watched videos of the week, including music from Jason Derulo, Friendly Fires, La Roux, and Green Day.

UK indie queen La Roux has the most watched video of the week on this week's Hot 5 with her 'The City' featured video 'Bulletproof.' Watch it now along with music videos by Jason Derulo, Shwayze, All Time Low, and T.I.!

All Time Low take their first number one spot on the weekly Hot 5! Check out their latest single, along with the rest of the most watched videos of the week, including music by Miley Cyrus, T.I., Foo Fighters, and Death Cab for Cutie.

Miley Cyrus' hot new single 'Party in the U.S.A.' kicks off this week's latest edition of the Hot 5! Listen to it along with the rest of the most watched videos of the week, including music by Foo Fighters, Jay-Z, Muse, and Rise Against.

UK rockers Muse head up the latest edition of the Hot 5 with their new single 'Uprising.' Watch it along with the other most watched videos of the week, including music by Taylor Swift, Jordin Sparks, Keri Hilson, and Alice in Chains.

Hot off of her big VMA win, Taylor Swift heads up the Hot 5 with her video 'You Belong With Me.' Watch it along with the other most watched videos of the week, including music by Madonna, Alice in Chains, Jordin Sparks, and Tokio Hotel.

German popstars Tokio Hotel have the most watched video of the week with their sci-fi smash hit 'Automatic.' Watch it along with videos by Madonna, Trey Songz, Mary J. Blige (featuring Drake), and the one and only Pearl Jam!

Pearl Jam's latest video kicks off the long weekend edition of the Hot 5 on MTV! Watch 'The Fixer,' along with the rest of the most watched videos of the week, including music by LMFAO, Trey Songz featuring Drake, Asher Roth, and Jay-Z.

Being featured in the Real World does wonders for a video as evidenced by our current top three videos of the week! Check out the entire Hot 5 featuring music by 3Oh!3, LMFAO, the Dead Weather, and Nicole Holness.

MTV Live's very own Nicole Holness makes her debut at the top of the Hot 5 with her fresh new video 'Epic'! Watch it along with the other most watched videos of the week, including music by Eminem, Metric, Jay-Z, and Lights.

Canada's very own pop princess Lights takes her "keytar" right to the top of the Hot 5! Watch 'Saviour,' along with the rest of the most watched videos of the week including music from LMFAO, Rick Ross, Paramore, and MTV's Nicole Holness.

LMFAO leverage their recent Real World appearance into a number one spot on the Hot 5! Watch 'I'm in Miami Trick' along with the rest of the most watched videos of the week, including music by Shakira, U2, Demi Lovato, and Kid Cudi.

Demi Lovato makes her Hot 5 debut with her new hit video 'Here We Go Again.' Watch it, along with the rest of the Hot 5, including music by Kid Cudi, Mariah Carey, Beyonce, and Animal Collective.

Kanye and Kid Cudi lead off the most watched videos of the week with their new video 'Make Her Say.' Watch it now along with videos by Mariah Carey, MGMT, T.I., and Beyonce.

T.I. and Mary J Blige's 'Remember Me' is the most watched video of the week on the Hot 5! Watch it along with the rest of the list, including videos by Beyonce, Kings of Leon, Eminem, and Jay-Z.

Jay-Z heads up this week's Hot 5 with 'D.O.A. (Death of Auto-Tune)! Watch it along with the rest of the most watched videos of the week including music by Green Day, classic Michael Jackson, Kings of Leon, and Britney Spears.

The King of Pop is the current King of the Hot 5 as three classic Michael Jackson videos are among the most watched of the week! Pay your respects to Michael and check out the rest of the list including videos by Green Day and Jay-Z.

Kanye West has the most watched video of the week as his Rihanna starring 'Paranoid' takes over the Hot 5. Watch it along with videos by Linkin Park, Alexisonfire, MGMT, Kings of Leon, and more.

Linkin Park's new Transformers fuelled theme song 'New Divide' heads up the latest edition of the Hot 5. Watch it along with the rest of the list including videos by Kanye West, MGMT, Kings of Leon, and Beyonce.

Kings of Leon prove that they're the kings of the MTV.ca with their latest Hot 5 chart topper 'Notion.' Watch it along with other hit videos by Glasvegas, Spencer Pratt, Yeah Yeah Yeahs, and Jordin Sparks.

Believe it or not, Spencer Pratt is at the top of the Hot 5 with his rap single 'I'm a Celebrity'! Watch it again (you know you watched it...) along with videos by Beyonce, Green Day, Pussycat Dolls, and Glasvegas.

Canadian rockers Alexisonfire are back on top of the Hot 5 with their new single 'Young Cardinals.' Watch it now along with videos by Cage, Heidi Montag, Eminem, and Flo Rida.

Rising hip hop star Asher Roth heads up the most watched videos of the week on an all-new Hot 5! Check out 'Be By Myself' along with videos by Heidi Montag, Eminem, Kanye West, and Katy Perry.

Katy Perry has the most watched video of the week with her latest hit 'Waking Up in Vegas.' Watch it along with the rest of the Hot 5, including music from Yeah Yeah Yeahs, Eminem, Metric, and Incubus.

Green Day are on top of the Hot 5 with 'Know Your Enemy,' the first single off of their upcoming album. Watch it along with videos by the All-American Rejects, Metric, Ne-Yo, and Yeah Yeah Yeahs.

Emily Haines heats things up on the Hot 5 in Metric's latest video 'Gimme Sympathy.' Watch it along with music by Pussycat Dolls, Lil Wayne, Kelly Clarkson, and Glasvegas.

Pussycat Dolls head up the five most watched videos of the week on the Hot 5! Watch their video 'Jai Ho! (You Are My Destiny),' along with videos by Black Kids, the Cool Kids, Eminem, and Lil Wayne.

Yeah Yeah Yeahs start off the latest edition of the Hot 5 with their brand new single 'Zero.' Watch it now along with the rest of the list, including videos by Britney Spears, Flo Rida, and the Pussycat Dolls.

Ciara and Justin Timberlake heat up the Hot 5 with their sexy new video 'Love Sex Magic.' Watch it along with videos by Britney Spears, Pussycat Dolls, Yeah Yeah Yeahs, and Kanye West.

Britney Spears sets the Hot 5 ablaze with her latest hit video 'If U Seek Amy.' Watch it along with the rest of the most watched videos of the week including music by Pussycat Dolls, Kelly Clarkson, Kanye West, and Lil Wayne.

Asher Roth shows his love for college in his suburban hip hop track 'I Love College.' Watch it along with the rest of the list, including music by Lily Allen, Flo Rida, Beyonce, and T.I..

Lily Allen's 'The Fear' is the most watched video of the week on this week's Hot 5. Watch it along with the rest of the list, including videos by Flo Rida, Beyonce, T.I., and Asher Roth.

Beyonce's latest single 'Diva' is on fire at the top of the Hot 5. Check it out along with the rest of the list, including videos by Flo Rida, Katy Perry, T.I., and the Ting Tings.

My Chemical Romance hit the top of the Big 10 with their punky approach to Bob Dylan's 'Desolation Row.' Watch it along with videos by T.I., k-os, Katy Perry, and U2.

Rock mega-stars U2 kick off the latest Hot 5 list with their new single 'Get On Your Boots.' Watch it along with videos by City and Colour, Coldplay, Young Jeezy, and Beyonce.

Coldplay heads up the latest edition of the Hot 5 with their latest single 'Life in Technicolor ii.' Watch it along with videos by Kelly Clarkson, Young Jeezy, Lily Allen, and Beyonce.