Britney Spears and Jason Trawick dashed out of a building in London today. Britney carried a prop gun, and Jason sported fake neck tattoos while the duo filmed Britney's new video for her single "Criminal." It's a sweet cameo for Britney's boyfriend, who has been traveling with her throughout her Femme Fatale Tour. They made their way to the UK late last week to promote the European portion of the performances, and Britney will kick off the tour in Russia on Thursday. She'll make stops in France, Germany, Ireland, and more in the coming months and in addition to her time on stage, she'll also be releasing her remix album, B in the Mix, in October.