"American Idol" fans will have a decision to make this Tuesday. The crowd from season 9—including Crystal Bowersox, Casey James and winner Lee Dewyze—takes the stage at Conseco Fieldhouse. Meanwhile, Adam Lambert, the high-profile singer who was runner-up to Kris Allen on the eighth season of the show, plays at Clowes Hall. Well, maybe the decision isn’t so difficult: Lambert’s show is sold out. Details here and here.