What was your favorite song in 2015? Chances are it made it into this mashup by DJ Earworm. The 5-minute compilation contains no less than 50 of the biggest hits of 2015, and the result is pretty impressive. The mashup features songs by artists such as Adele (d’oh), Ariana Grande or Jason Derulo. All you Taylor Swift fans out there will be happy to know she has not one but four songs that were featured. Without further ado, I give you the most popular songs in the U.S., according to Billboard’s weekly Hot 100 charts: