"Who You Epp?" is a song by Nigerian rapper Olamide. The Shizzi-produced track was originally performed alone, released on 2 April 2016 as a freestyle. The song grew through an open-verse challenge, where Olamide left 16 bars open for artists to record their own parts. Many artists took part, both mainstream and underground. Notable artists who participated include Chinko Ekun, Ruggedman, Ayo Jay, Reminisce, Mz Kiss, among other acts. Phyno added a verse the day after the song's release, and a version featuring Wande Coal was made publicly available on 26 April 2016. Olamide later released the official remix featuring both artists on 31 May 2016, accompanied by a music video directed by Sesan. Olamide won the award for Best Street-Hop Artiste for the song at the 2016 edition of the Headies, as well as Song of the Year at the 2016 edition of the Soundcity MVP Awards Festival.