7-Eleven, Inc. is mixing up the 2011 Summer of Slurpee® with a mash-up of cool cups, cold concoctions and sold-out concerts that are proving to be hot, hot, hot. Not only is 7-Eleven encouraging Slurpee flavor-mixing with its ingenious MixMaker dual-chambered cup and valve straw, the retailer is mixing up the Slurpee summer season with its popular MixMaker Summer Concert Series. The third in the series features Gym Class Heroes, appearing July 25 at Chicago’s Lincoln Hall.

Tickets for the Chicagoconcert are $7.11 and go on sale Friday, July 8, at noon on the Lincoln Hall website (http://www.lincolnhallchicago.com). Slurpee Rewards points also can be cashed in for free concert tickets at www.slurpee.com, while they last. Tickets for the all-ages, general admission concert will be held at will-call, which is actually a list of names at the door. Photo ID is required to verify age and ticket purchase.

Gym Class Heroes will take a break from the 2011 Vans Warped Tour to bring their musical talents to the MixMaker concert in the WindyCity. The alternative hip-hop band will release The Papercut Chronicles II this fall, its first album since frontman Travie McCoy’s solo album Lazarus, which featured the smash hit “Billionaire.”  “Stereo Hearts,” the first single from The Papercut Chronicles II, was recently featured on the NBC series “The Voice,” and is available now at all digital retailers.  We are the In Crowd, a pop-punk band fromNew York, will open the show.