Chris Brown and Trey Songz performed “Bottoms Up,” one of this summer’s hottest club-bangers at Chris’s F.A.M.E Tour where he also sang Happy Birthday to his mother Joyce! Trey joined Chis onstage, turning normal “tour yelling” into over-the-top ear bludgeoning screams. “Shout to all that artists on The F.A.M.E tour & most importantly @chrisbrown for shutting VA down tonight!!!! Crowd was on a million!!!!!” tweeted Trey.