Morton Amphitheater hosted its first-ever concert Wednesday, welcoming crowds of fans to see Kesha at the brand-new venue in Riverside, Missouri."It's awesome," said Annie Hartley, who attended the show Wednesday. "I've been waiting for it and ... I was like, I have to go. I have to get tickets." The new Morton Amphitheater has 30 shows scheduled so far, ranging from rock to country to hip hop.