JT Fallon Finale

AND WHAT DID YOU DO LAST WEEK?: RCA megastar Justin Timberlake wraps up his very busy week on Jimmy Fallon with a 10-minute medley of his hits, backed by his huge, ultra-tight band. In this powerhouse clip, JT (who preceded his weeknight marathon with a killer SNL show as host and performer) jumps from center stage to the piano and back, plays directly to the camera, and brings the studio audience to its feet. He's now pretty much done everything imaginable to amp up anticipation for his The 20/20 Experience (streeting Tuesday) short of showing up at fans' homes. Check out this raucous mini-concert and see what we mean. You'll find more clips from his Fallon week here. (3/16p)