Before it kicks off its third season this fall, the popular Spike cable show Lip Sync Battle will air an hour-long special live on Sept. 11.
To up the ante, Lip Sync Battle: All-Stars will bring back previous contestants, all of them past winners. John Legend, actress Olivia Munn and actor Terry Crews have so far been announced as contestants for the special, which airs at 8 p.m. ET. Winners will be decided by fan voting.