Zara Larsson will be performing at the Vic Theatre on Thursday, July 30, and Major Lazer will perform at Sound-Bar that day, as well.
Five Seconds of Summer will perform at Salt Shed on Saturday, Aug. 1.
See the full lineup at www.lollapalooza.com/aftershows. Tickets go on sale at 10 a.m. Friday.
Lollapalooza's daily schedule is out, as well.
The festival returns to Grant Park from July 30 through Aug. 2.
This year's headliners include Charlie XCX, Tate McRae, Lorde, Olivia Dean, John Summit, Jennie, The Smashing Pumpkins and The XX.
Chicago saw record-breaking hotel stays last summer, thanks in part to Lollapalooza.
Choose Chicago reports people booked 3.56 million rooms from June through August, generating $949 million in revenue.
The video in the player above is from an earlier report.