"Ew!" is a song by American television host and comedian Jimmy Fallon, featuring American rapper will.i.am. The song is based on a sketch from The Tonight Show Starring Jimmy Fallon, in which Fallon and guests play teenage girls constantly disgusted by things around them.
The song debuted on The Tonight Show on October 6, 2014, with Fallon urging viewers to get the song to chart on the Billboard charts. It debuted on the Billboard Hot 100 one week later at number 26.