WATCH: A Mashup 2013’s Top 25 Hits

DJ Earworm has released his annual audio/video mashup of 2013's Top 25 most popular songs in the U.S., as determined by Billboard's weekly Hot 100 charts. "United State Of Pop 2103 (Living The Fanatsy)" features everyone from Avicii to Will.I.am and Bruno Mars to Taylor Swift. Imagine Dragons, Justin Timberlake, Maclemore & Ryan and Miley Cyrus each placed two songs on the playlist.