Tony Bennett, Lady Gaga: Cheek to Cheek

Lady Gaga's classical training has always been key to her origin story, so this album with 88-year-old crooner Tony Bennett is no big surprise. Gaga has real chemistry with Bennett (whom she befriended after they performed together at a benefit in 2011) on breezily swinging tunes like Cole Porter's "Anything Goes." Befitting a singer who harnessed vocal firepower on huge club tracks, she sometimes blasts away at these songs rather than relaxing into them. But on challenges like the subtle Billy Strayhorn ballad "Lush Life," the queen of the little monsters more than proves she can be a sophisticated lady too.