SIGHTING: Celebrities watch Federer win his fourth round match

FedFans Gavin Rossdale + Gwen Stefani

Like Andy Roddick, Roger Federer can bring the stars out to Arthur Ashe Stadium as he did last night for his 6-3, 7-6 (4), 6-3 fourth round win over 13th seed Jurgen Melzer. He'll face a huge obstacle, in all ways, on his path to a sixth US Open title when he battles Robin Soderling in the quarterfinals, a rematch of their meeting Roland Garros in the same round won by the Swede.

One quick note: It appears Gwen Stefani + Caroline Wozniacki are either sharing nail polish bottles or, worse, visiting the same manicurist. And we all know who's to blame. Carry on.

Alex Rodriguez

Cameron Diaz

Pete Wentz + Ashlee Simpson

Boris Becker

 [Photo(s): Getty Images]

PHOTO OP: Gwen + Baby Zuma share playtime with Mirka

Gwen Stefani + Baby Zuma Nesta Rock Rossdale were spotted playing (and probably sharing baby-raising tips) with mommy-to-be Mirka Vavrinec in the baller box watching Roger Federer dismiss Fernando Gonzalez 6-3, 5-7, 6-2 in the fourth round at Indian Wells. The 13-time Grand Slammer will next face the streaking Fernando Verdasco in a battle of forehands for a spot in the final four.

Zuma Nesta Rock Rossdale. Really? And some of you thought Baby Mango was ridiculous. Think again.

(image via getty)