"E-Pro" is the opening track on Beck's 2005 album Guero. It was released as the lead single from the album in March 2005. The song was Beck's second #1 on the Modern Rock chart and his first in eleven years. Beck used the rhythm track of the Beastie Boys' "So What'cha Want" as a sample in "E-Pro." Both of those songs are featured in the videogame Rock Band 2.