Leighton Meester and Blake Lively ditch New York's Upper East Side for a downtown party. Plus: Ashlee Simpson, Will Smith and more


After debuting her new single "Little Miss Obsessive" on a Chicago radio station, Ashlee Simpson pokes fun at herself before performing at the Stoli Elite party at the Underground on Thursday. " I love Chicago," Simpson tells PEOPLE. "I want to live here someday."

Sign up for our daily newsletter and other special offers.
    Choose your newsletters
Thank you for signing up! Your request may take up to one week to be processed.
    see all newsletters