Paparazzi GPS: Cameron Diaz in London, Matthew McConaughey in L.A. and More

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From London to Los Angeles and everywhere in between, we bring you some shots of celebs out and about in this edition of GPS!
First, cameras spotted Matthew McConaughey and girlfriendCamila Alves as they quickly greeted fans upon arriving at the 'Bernie' premiere in Los Angeles yesterday.
Meanwhile, Cameron Diaz gets ushered in amongst a bevy of onlookers as she was at The Dorchester in London to promote her new film, 'Bad Teacher.'
In Washington, DC, we saw Jon Stewart entertain the crowd Thursday night at the Bob Woodruff Foundation's "Night of Heroes" gala, where he made jokes about former CongressmanAnthony Weiner and other notable personalities.