A pregnant M.I.A. and N.E.R.D. performed at the Diesel xXx “Rock and Roll Circus” at Pier 3 in Brooklyn on Saturday. The surprise guests of the evening were chart-topper T.I. and the legendary Chaka Khan.

T.I. performed “Swagga Like Us” with M.I.A., “Hi Hater” with Maino, and “Live Your Life” with rock group Franz Ferdinand, while Khan appeared during British electropop band Hot Chip’s set. N.E.R.D. backed up M.I.A. on “Paper Planes.”