YouTube released the world's top ten most-watched videos from major music labels in 2011.
Frontrunners include two videos each by American rapper Pitbull and American electro duo LMFAO, as well as pop stars J Lo and Katy Perry.
Here are the top ten most-watched music videos on YouTube this year:
1. Jennifer Lopez:
"On the Floor" featuring Pitbull
This year, J Lo flaunted club-style dance moves in her Pitbull-backed video for the first single from her new album, Love?, released in April. The video has so far received more than 454 million page views.
"Party Rock Anthem" featuring Lauren Bennett, Goon Rock
Los Angeles hip hop duo LMFAO, consisting of DJ Redfoo and his nephew SkyBlu, released the clip for their international hit track "Party Rock Anthem" from their second album Sorry for Party Rocking. The video has received more than 326 million page views.
3. Bruno Mars:
"The Lazy Song"
Coming in at more than 249 million page views, American singer-songwriter Bruno Mars's video for "The Lazy Song," from his 2010 debut LP, Doo-Wops & Hooligans, is a minimalistic clip filmed with one camera, five dancers, and some monkey masks.
4. Nicki Minaj:
Seductive moves, bright colors, black lights, and a motorcycler sculpted from ice take centerstage in this Pink Friday video from rap star Nicki Minaj. Page views: more than 205 million.
"Give Me Everything" featuring Ne-Yo, Afrojack, and Nayer
American rapper Pitbull released this video for his second single from his sixth studio album, Planet Pit, in May. Pitbull fans have tuned in more than 190 million times.
"Rain Over Me" featuring Marc Anthony
Pitbull dons a white suit and teams up with singer Marc Anthony in this desert-shot clip for "Rain Over Me," also featuring Miss Haiti 2010, Sarodj Bertin. Page views: more than 193 million.
7. Jessie J:
"Price Tag" ft. B.o.B.
UK starlet-on-the-rise Jessie J is a babe in Toyland in her "Price Tag" video, which has received more than 170 million page views.
8. LMFAO -
"Sexy and I Know It"
Another hit track from Sorry for Party Rocking, LMFAO's parody clip "Sexy and I Know It" pays homage to Michael Jackson's "Thriller." Page views: more than 170 million.
9. Katy Perry:
"E.T." featuring Kanye West
The US pop star Katy Perry floats around in space dressed as an alien in this clip for the fourth single from her third studio album, Teenage Dream. Page views: more than 151 million.
10. Katy Perry:
"Last Friday Night (T.G.I.F.)"
For her party anthem, Perry transforms into a nerd named Kathy Beth Terry and stars alongside an ensemble cast of '80s and '90s icons, including Hanson, Kenny G, Debbie Gibson, and Corey Feldman. The video has received more than 144 million page views.