This Weekend's Must-See Snaps!

Katy Perry showed support for Neil Patrick Harris and his new Broadway show, Hedwig and the Angry Inch, when she visited him backstage at his musical revival in NYC on Saturday. Elsewhere, Reese Witherspoon had a stylish Saturday running errands and Mad Men costars Elisabeth Moss and Jon Hamm met up for coffee in the Big Apple. Keep reading for more must-see snaps!

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Jon Hamm and Elisabeth Moss headed out for coffee in NYC on Saturday.

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Lea Michele and Darren Criss met up with Ryan Murphy at Friday's Taste For a Cure gala in LA.

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On Saturday, Reese Witherspoon ran errands around Santa Monica.

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Rosie Huntington-Whiteley and Jason Statham had a date night in London on Saturday.

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On Friday, Joel McHale and Alyson Hannigan chatted at the Taste For a Cure gala in LA.

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On Friday, Gwen Stefani ran errands around LA.

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Hilary Duff visited a coffee shop in West Hollywood on Friday.

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Katy Perry visited Neil Patrick Harris backstage at Hedwig and the Angry Inch on Broadway on Saturday.

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Reese Witherspoon made a Friday stop by the gym in Brentwood in LA.