Taylor..."Jailhouse Rock", "Hound Dog", and obviously "I'm All Shook Up."
I don't know what the girls will sing, though. Or the hardrocker dude.
I'll probably get slapped for this one, but I think they need to be very careful on their song picks. In my opinion, some of Elvis' songs are BORING!
I do like Crying in the Chapel, Suspicious Minds, Little Sister, Jailhouse Rock, All Shook Up, Heartbreak Hotel, Hard Headed Woman, One night, It's Now or Never, Are You Lonesome Tonight?, Stuck On you, Surrender, Devil in Disguise, Way Down, The Wonder of You.
You just reminded me of some more good ones. I think that some of them are made for Taylor and Elliot.