SXSW: Miley Cyrus Perform With Mike Will Made-It

SXSW just got hit with a surprise wrecking ball -- Miley Cyrus. The pop singer made an impromptu appearance onstage at Fader Fort in Austin, Texas, with some special guests. Miley took the mic in the latter stages of Mike Will Made-It's set. She then launched into the song she made with her producer-pal, "23," before leaping into her hit "We Can't Stop." The one-time Hannah Montana star also teamed with guest Future and with Rae Sremmurd on "Throw Sum Mo," lifted from the hip-hop act's album SremmLife. Other guests included Riff Raff and Two-9.