Photos of Celebrities Watching US Open Day 13 and 14

The US Open Gets a Dose of Star Power

Photos of Celebrities Watching US Open Day 13 and 14

From Serena Williams's outburst to Roger Federer's amazing shot there was a lot of action at the US Open this weekend in NYC. Justin Timberlake, Gwen Stefani, Gavin Rossdale, Ashley Olsen and so many others cheered on their favorite tennis players from the stands — check out all of the celebrities who came out!

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