The Horseshoe Casino has announced their summer concert series: May 16: The KillersMay 21: The Shins w/ Ra Ra RiotJune 8: Ke$haJune 9: Huey Lewis & The NewsJune 14: Billy IdolJuly 6: Barenaked Ladies, Ben Folds Five, GusterJuly 7: Alice CooperJuly 19: Willie NelsonJuly 25: Sugar...