Star Matchmaker

With Christina Aguilera engaged, pick the best dates for her younger sisters in pop: Ashlee Simpson, Christina Milian and Hilary Duff

CHRISTINA MILIAN, 23

The singer and Be Cool costar moves between hip-hop and Hollywood without missing a beat. And she's the responsible type: She bought a house to share with Mom.

Who would make her happy? Our candidates:
Nick Cannon: The Love Don't Cost a Thing couple shared chemistry offscreen too
Jay Hernandez: He's also a hot artist – the Torque star paints in his spare time
Paul Walker: A foot taller, the 6'2" star of The Fast and the Furious can be someone to look up to