Pictures of Gwen Stefani, Gavin Rossdale, Ashlee Simpson, and Cameron Diaz at the US Open Finals in NYC

by POPSUGAR Celebrity 2

Gwen Stefan and Gavin Rossdale were front and center in Queens, NY last night cheering on Roger Federer as he defeated Austria’s Jurgen Melzer advancing to the quarterfinals of the US Open. Gavin spent the afternoon in Manhattan with Roger before his match then caught up with Gwen and the boys for an afternoon of face painting and family time in the Big Apple. Gwen's relaxing and enjoying time with her family before she switches into full on fashion mode. On Friday she's debuting her new scent, Wicked Style, at Fashion's Night Out. Ashlee Simpson and Pete Wentz enjoyed date night at yesterday's big game and it turns out she'll also be involved with NYC Spring Fashion Week supporting her sister and she'll even be modeling some of the items from the Jessica Simpson Collection later today.

Alex Rodriguez watched the match from the front row while his girlfriend Cameron Diaz kept her distance. The two were spotted out celebrating her 38th birthday earlier in the week but aren't yet ready to go fully public with their relationship. A-Rod isn't the only Yankees tennis fan, as his teammate Derek Jeter took in the action on Saturday with his lady Minka Kelly.

To see more photos of Gwen, Gavin, Ashlee, Cameron, and more, just read more.