Valley Forge Casino Resort (1160 First Avenue) welcomes Chicago frontman and solo star Peter Cetera on Sunday, October 11, 2015 at 8:00pm (doors open 7:00pm) during Valley Forge Music Fair. Penning and singing lead vocals on Chicago’s first No. 1 single “If You Leave Me Now,” Cetera helped propelled the group into the worldwide spotlight. The Grammy Award winning singer/songwriter will perform timeless hits that helped him define an era of American rock music. Tickets are on sale for $45 to $75 on Ticketmaster.