1) PSY - GANGNAM STYLE - 989,008,627 Million times viewed.
Gangnam Style is a K-pop single by South Korean musician PSY. The song was released on July 15, 2012, as the lead single of his sixth studio album PSY 6 (Six Rules), Part 1. "Gangnam Style" debuted at number one on the Gaon Chart, the national record chart of South Korea. As of December 20, 2012, the music video has been viewed over 988 million times on YouTube, and is the site's most watched video after surpassing Justin Bieber's single "Baby"
"Baby" is a song by Canadian recording artist Justin Bieber. It was released as the lead single from the latter half of Bieber's debut album, My World 2.0. The track was written by Bieber with Christopher "Tricky" Stewart and Terius "The-Dream" Nash, both of whom worked with Bieber on "One Time", and also by R&B singer Christina Milian and labelmate, rapper Ludacris. It was available for digital download on January 18, 2010.
"On the Floor" is a song recorded by American recording artist and actress Jennifer Lopez featuring American rapperPitbull. It was released by Island Records on February 8, 2011 as the lead single from her seventh studio album Love?(2011). "On the Floor" was written by Bilal Hajji, Kinda Hamid, Gonzalo Hermosa, Ulises Hermosa, Achraf Janussi and Pitbull, along with the song's producer RedOne. Its release coincided with Lopez's appointment as a judge on the tenth season of US reality TV show American Idol, as well as several other product endorsement deals. American Idol also provided a platform to debut the single's music video, as well as the stage for Lopez's first live performance of the song.
"Love the Way You Lie" is the second single from American rapper Eminem's seventh studio album Recovery. SingerSkylar Grey was inspired to write and record the demo with Alex da Kid when she felt that she was in an abusive romantic relationship with the music industry. Eminem wrote verses to the track and chose Barbadian singer Rihanna to sing the chorus; the collaboration was influenced by their past experiences of domestic violence. Recording sessions were held inFerndale, Michigan, and Dublin, Ireland. The song is a midtempo hip hop ballad with a pop refrain. Backed by guitar, piano and violin, it describes two lovers who refuse to separate despite being in a love–hate abusive relationship.
"Party Rock Anthem" is a song performed by American electro recording duo LMFAO, featuring British singer Lauren Bennett and GoonRock. It was released as the first single from their second album Sorry for Party Rocking in 2011. It interpolates lyrics from Rick Ross' song "Hustlin". The single has gone to number one in Australia, Belgium, Brazil, Canada, Denmark, France, Germany, Ireland, New Zealand, Switzerland, the United Kingdom and the United States. It also reached the top five in Norway and Italy. Certified 11x Platinum, it is the second biggest-selling single of all time in Australia, behind only Elton John's "Candle in the Wind 1997".