The singers join forces for a weekend concert in Sin City. Plus: Natalie Portman, Gavin Rossdale, Jason Derulo & more!

LOOKING GOOD

Was this her big moment on the Jumbotron? Something's making Orange Is the New Black's Laura Prepon grin big at Sunday's hockey game at N.Y.C.'s Madison Square Garden, where the New York Rangers were trounced by the Toronto Maple Leafs, 6-3.