According to Aceshowbiz:

The Hollywood Reporter shares the words that “American Idol” alum Jennifer Hudson as well as veteran rocker Jon Bon Jovi, and Earth, Wind and Fire, are all set to support the gig to be held this coming October 7.

Also tapped to perform at the forthcoming “30 Days to Victory Concert”, which is set to take place at the Nokia Theatre in Los Angeles, are Earth, Wind & Fire. They will join Katy Perry, who has already been confirmed as one of the guest stars. Additional performers, meanwhile, are expected to be unveiled in the coming days.

Serving as the producers for the fundraising event are Ken Ehrlich and members of Obama’s Entertainment Advisory Council. Tickets have been sold online starting from $44 each. Following the gig, there will be a $25,000-per-person dinner to be held in downtown Los Angeles. The dinner will be hosted by Jefferey Katzenberg.