YouTube celebrates the end of year with "Rewind YouTube Style 2012," a video that relives the most memorable and globally top-trending videos of 2012. Highlighting the infectious hit "Gangnam Style" and Carly Rae Jepson's "Call Me Maybe," "Rewind YouTube Style" features a comedic mash-up of both videos with appearances by Psy and popular YouTube acts such as Walk off the Earth, JennaMarbles, RyanHiga, RealAnnoyingOrange, and ShitGirlsSay among many more. 

To commemorate Korean singer Psy's achievement for most watched video with "Gangnam Style" raking in over 900 million views, YouTube's logo has also changed to showcase a cartoon character of Psy dancing the addictive "horse dance."

See all your favorite YouTube stars together in one epic video by checking out the collaboration below!