Hilary Duff, trainer Kimberly Snyder and Jenna Dewan-Tatumhttp://img2.timeinc.net/instyle/images/2011/parties/041411-lead-330x400.jpg

The bookish crowd was out in full force last night! Hilary Duff, Jenna Dewan-Tatum and Fergie sang the praises of nutritionist Kimberly Snyder‘s The Beauty Detox Solution during a party at the London Hotel in Hollywood (shown). Meanwhile, famous foodie Eva Longoria showed off her new cookbook at a Los Angeles area Barnes and Noble, and Maria Menounos signed copies of her how to have it all guide in New York City. See more photos from last night’s hottest parties in the gallery.