VIDEO : Kesha Surprises Fans During Zedd's Nighttime Set Saturday at Day 2 of Coachella

Singer Kesha performs onstage with producer Zedd during day 2 of the 2016 Coachella Valley Music & Arts Festival on April 16 in Indio, California. (CNN)Surprise guests stars and the return of some legendary rockers set the tone for Day 2 of Coachella. Kesha led the charge of guest stars when the singer surprised fans during Zedd's nighttime set Saturday to join the DJ for a rendition of "True Colors," the title track off the EDM star's 2015 album.