hey i just got final cut express 4 and there is a specific effect that i can't seem to figure out. this effect makes the speed of the characters in the video move faster, but yet if the people singing to a song, their mouths move in time with the song but yet they move faster than real life in the video. heres a video example, http://www.youtube.com/watch?v=ekAXPCphKXQ. skip to 3:00. nicki minaj comes in and starts singing, shes moving fast but yet shes still in time with the music. someone wanna help me and tell me out to do that, or at least tell me the name of that effect for final cut express 4, THANK YOU!