10) Lady GaGa: 'Paparazzi'Directed by Swedish director, Jonas Åkerlund -- who has directed music videos for U2, The Smashing Pumpkins, Madonna, and Moby -- the eight-minute video (or short film) depicts GaGa as a celebrity who struggles with the love for fame and the love for the camera. The song charted in Australia, Canada, United Kingdom and Ireland, as well as hitting No.6 on the Billboard Hot 100. GaGa performed the single at the 2009 MTV Video Music Awards, and won Best Art Direction and Best Special Effects awards.
9) Jay-Z: 'Run This Town' Feat. Rihanna & Kanye WestThe Song features vocals by Rihanna and Kanye West (who also produces the single with No I.D.) Director Anthony Mandler's vision behind the video was to evoke a rebellious and uneasy tone while showcasing a militia or less-orderly, chaotic society. So far the single has peaked at No. 2 on the Billboard Hot 100, making it the highest charting song of Jay-Z's career as a lead artist.
8) Mariah Carey: 'Obsessed'Produced and written by Carey, The-Dream and Tricky, 'Obsessed' debuted at No. 11 on the Billboard Hot 100, making it Carey's highest charted debut since 1998. Rumors spread that the song is directed towards Eminem in response to his song 'Bagpipes from Baghdad.' Video director Brett Ratner says the video was inspired by the film 'King of Comedy' staring Sandra Bernhard and Jerry Lewis.
7) Justin Bieber: 'One Time'Bieber's manager Scooter Braun discovered Canadian pop singer Bieber on YouTube (who was doing impressive covers of Usher, Ne-Yo, and Justin Timberlake). Bieber signed with Island Records, and within the first week Bieber's debut single 'One Time' reached No. 12 in the Canadian Hot 100. The music video -- directed by Vashtie Kola -- includes several appearances by Usher.
6) Jay Sean: 'Down' Feat. Lil WayneThe music video was shot in London at the Hedsor House mansion, also the venue used for the Nicole Kidman film, 'The Golden Compass.' The song reached No. 1 on the Billboard Hot 100 Chart, making Sean the first British artist to have a No. 1 single since Coldplay with their 2008 hit 'Viva La Vida.'
5) Taylor Swift: 'You Belong With Me'In this video Swift plays both the brunette cheerleader/girlfriend of the high-school football star as well as the girl-next-door crushing on the football player. The song became Swift's highest charting single once it peaked at No. 2 on the Billboard Hot 100 (after being re-entered), and won her the 2009 VMA award for Best Female Video.
4) Owl City: 'Fireflies'A song about insomnia, the hit includes guest vocals by Relient K frontman Matt Thiessen, and features Owl City project-creator Adam Young in the music video. The song has already reached No. 38 on Billboard's Rock Songs chart, No. 28 on Alternative Songs, and No. 13 on Digital Songs.
3) Beyoncé: 'Sweet Dreams'Directed by Adria Petty, the video -- which focuses more on Beyoncé's alter ego, Sasha -- uses more graphics and special effects (compared to Beyoncé's other videos) and showcases Beyoncé's fashion style, which she picks up from her current favorite British designer, Gareth Pugh (who has similar footage in his Fall 2009 fashion video).
2) Miley Cyrus: 'Party in the U.S.A'The performance of this song at the 2009 Teen Choice Awards -- using a pole in her dance routine -- drew controversy because it was deemed inappropriate to the younger viewers. Cyrus including some personal references in her music video, such as the drive-in her parents went to during their courting days and reenacted scenes from her favorite movie,'Grease.'
1) Kelly Clarkson: 'Already Gone'The music video for this power ballad was shot in Toronto and was directed by Joseph Kahn, who was also worked on Clarkson's 'Never Again,' 'Walk Away' and 'Behind These Hazel Eyes' music videos.