Passage: Winehouse promoted the release of Back to Black with headline performances in late 2006, including a Little Noise Sessions charity concert at the Union Chapel in Islington, London. On 31 December 2006, Winehouse appeared on Jools Holland's Annual Hootenanny and performed a cover of Marvin Gaye's "I Heard It Through the Grapevine" along with Paul Weller and Holland's Rhythm and Blues Orchestra. She also performed Toots and the Maytals' "Monkey Man". At his request, actor Bruce Willis introduced Winehouse before her performance of "Rehab" at the 2007 MTV Movie Awards in Universal City, California, on 3 June 2007. During the summer of 2007, she performed at various festivals, including Glastonbury Festival, Lollapalooza in Chicago, Belgium's Rock Werchter, and Virgin Festival in Baltimore.

Question: What music festival takes place in Chicago?
Lollapalooza