Christina plus Cher is a match made in diva heaven. Then they throw burlesque into the mix -- realized on this soundtrack in the form of vintage soul, sultry brass and plenty of bump-n-grinding beats -- and the collaboration makes even more sense. Xtina carries most of the vocal duties, venturing beyond her usual belting to try new styles like the raw, quiet opening to "Bound to You" or the breathy coyness of "But I Am a Good Girl." Meanwhile, Cher does her best Joel Grey on "Welcome to Burlesque." Campy, sexy, overblown and intriguing: In other words, the album's a near-perfect burlesque.