It's time for the Big Gig once again. Here, I scour the schedule to make some suggestions for some must-see acts at Summerfest 2013.

Every year, the staff at OnMilwaukee.com offers up its picks for the best music on tap at Summerfest. This year, we added a different approach, asking some national authors who are visiting Milwaukee in the coming weeks to look at the schedule and tell us who, if they had their druthers, they'd be sure to catch at the Big Gig in 2013. And, hey, Pitbull, wanna co-write a book?