Tinseltown is descending on the capitol, and RadarOnline.com has all the exclusive details about what the stars are doing this weekend.  DC hasn’t seen this many celebrities since, well, Barack’s inauguration!  Jennifer Garner, Jessica Alba, Jennifer Lopez, and Goldie Hawn already in town and TomKat, Sting and other A-listers are expected.  DC is now cool again -- thanks Mr.

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