Richie makes a fashionable book-signing appearance in L.A. Plus: Justin Timberlake, Khloe & Kim, Katy Perry and more
Credit: Anthony Dixon/WENN
Published: Thursday Oct 07, 2010 | 05:00 PM EDT
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You never know who you'll bump into on the MTA! Tyra Banks and Clay Aiken keep each other company Wednesday while taking the subway in New York.
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