Straight No Chaser bring their jaw-dropping vocal prowess, soulful harmonies and a cappella charisma to a concert at San Diego's Cal Coast Credit Union Open Air Theatre, where they'll share a bill with Scott Bradlee's Postmodern Jukebox. Both bands specialize in contemporary pop songs delivered with timeless flair. You'll re-think the stuffy notion of all-male a cappella groups when SNC does what they do best: making musical worlds collide. Think unconventional genre mashups like Frankie Valli and One Republic. Meanwhile, PMJ will crank out their signature "pop music in a time machine," re-interpreting pop, rock and R&B hits in the style of swing, doo-wop, ragtime and Motown from yesteryear.