At Puddle of Mudd's Dallas concert April 16, singer Wes Scantlin appeared to be lip syncing.
Fan-filmed video also seems to show Scantlin in a confrontation with an audience member, reportedly who called him Milli Vanilli.
Scantlin eventually left the stage but later returned, throwing bottles and his microphone.
Watch fan-filmed video from the show below (warning: not-safe-for-work language). Fan posts to the band's Facebook page were not flattering of the concert.
At :58 of this video, Scantlin puts the microphone into the audience, but his voice can still be heard singing:
Scantlin's mic is cut off:
At 1:12, Scantlin throws the mic, in frustration after being cut off by the soundboard.
Photo credit: Getty Images