Pippa Middleton at Breast Cancer Fundraiser

This week Michelle and Barack Obama welcomed South Korea's first couple to the White House with a state dinner, while Queen Elizabeth hosted famous Aussies like Hugh Jackman and Elle Macpherson ahead of her trip Down Under. While Pippa Middleton didn't make an appearance at Buckingham Palace, she did go out on the town in London for a breast cancer fundraiser. See all that and much more in the week in pictures!