The latest addition to this years Lollapalooza Festival is Primus. The band will perform at the event in Chicagos Grant Park on Saturday, July 23rd for what looks to be the only Primus performance of the year. In addition, since Les Claypool will be in town, he has added a show for his current touring band on the previous night, July 22 at Chicago’s Vic Theatre. Claypools group this summer, which will gig for much of July, includes Skerik, Mike Dillon, Jay Lane and Gabby La La.