“Levels” is one of Avicii’s largest hits ever. Although it didn’t chart majorly in the United States, it hit #1 in his native Sweden, and made Top 10 in other countries.

It samples the 1962 “Something’s Got a Hold of Me,” by Etta James, which later influenced Flo Rida to sample it for “Good Feeling,” which resulted in his own hit.

Infectious, isn’t it? Well, the music video is about an infection too. A dance infection, a la “Party Rock Anthem”.