Ritchie has a lads' evening out with Jude Law and Robert Downey Jr. in London. Plus: Jennifer Lopez, Britney Spears, Ashley Olsen and more

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CONCERT TUNE-UP

Christina Aguilera makes a vibrant arrival at a pre-show press conference in Abu Dhabi in the United Arab Emirates Thursday. Later that evening, the pop star was set to make her live Middle East concert debut at the Emirates Palace Hotel.