"Hangover" is a single by South Korean K-pop musician Psy, produced by Yoo Gun-hyung, featuring American rapper Snoop Dogg. Its music video debuted on the June 8, 2014 broadcast of Jimmy Kimmel Live!. As of April 2018^[update], the video has received over 310 million views on YouTube. The song serves as a follow-up to Psy's two international hit singles "Gangnam Style" and "Gentleman".

In January 2014, YG Entertainment confirmed that Psy's upcoming single will feature the American rapper Snoop Dogg, along with K-pop singer G-Dragon. On March 12, 2014, it was revealed that CL of 2NE1 would also appear in the video.

According to YG Entertainment, the music video was produced in January 2014 during Snoop Dogg's visit to South Korea. In an interview with CNN, Psy revealed that the video was filmed over the course of 18 hours at 10 different locations near Incheon International Airport.

Time magazine described the music video as "delightful", while Spin magazine compared the music to "cacophonous EDM-rap" that is "unlikely to ease a hangover", but the end result is "still a curiously enjoyable five minutes".

Immediately after its release, reactions on social media were mixed. The Wall Street Journal noted that some viewers were "soaking it up", while others have voiced their "complaints about both the song and the video". In South Korea, some fans described the music video as a wrong depiction of Korean culture. Within 24 hours of release, the music video for "Hangover" racked up over 10 million views.

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