"Gangnam Style" surpassed "Baby" in November 2012; first video to reach 1 billion views on December 21, 2012; first video to reach 2 billion views on May 30, 2014.
"Dark Horse" became the third video to reach 1 billion views on June 22, 2015, and the first featuring a female recording artist.
"Blank Space" became the fourth video to reach 1 billion views on either July 7 or July 8, 2015, and the first solo female artist.
"Roar" became the fifth video to reach 1 billion views on either July 22 or July 23, 2015, and Katy Perry became the first recording artist with 2 videos over 1 billion views.
"Bailando" became the sixth video to reach 1 billion views on August 15, 2015. It also became the second non-English music video to reach the 1 billion view mark.
"Wheels On The Bus" became the twelfth video, and the first non-music video, to reach 1 billion views on November 19, 2015.
Psy's "Gentleman," reached 100 million YouTube views in just four days in 2013.
As of January 2016, the three fastest videos to enter the Billion View Club are "Hello" (88 days after its posting to YouTube)"Gangnam Style" (160 days), "See You Again" (184 days).
Other videos with 1 Billion views in YT
PSY: GANGNAM STYLE
Justin Bieber - Baby (feat. Ludacris)
Katy Perry - Dark Horse (feat. Juicy J)
Taylor Swift - Blank Space
Katy Perry - Roar
Enrique Iglesias - Bailando
(feat. Descemer Bueno, Gente De Zona)
Taylor Swift - Shake It Off
Meghan Trainor - All About That Bass
Mark Ronson - Uptown Funk (feat. Bruno Mars)
Wiz Khalifa - See You Again
(feat. Charlie Puth)
OneRepublic - Counting Stars
Wheels On The Bus
Sia - Chandelier
Masha and The Bear
LMFAO - Party Rock Anthem
(feat. Lauren Bennett, GoonRock)