complicated. singing background remains remains a somewhat unheralded position, you know? so people make that leap. >> bruce springsteen talking about what you could call the unsung heros of pop, mariah carey, sheryl crowe, all of them began as backup singers. the film finally gives them their doo. tata vega has backed up michael jackson. later, i'll be joined by due jith hill who sunging with stevie wonder and elton john. welcome to all of you and happy valentine's day. >> same to you. >> so, this roll call of glor is extraordinary. you've sung with elvis presley, tom jones, rig go star, tore o