Twenty-one-year-old singer Demi Lovato has successfully made the transition from child actor to pop superstar. Her third album, 2011’s Unbroken, delivered the smash hit “Skyscraper,” a breathy piano ballad about how she feels like she’s made of glass. It’s a heavy-handed metaphor but it really connected with listeners. Simply entitled Demi, her latest album features the usual quotient of overproduced pop tunes (“Heart Attack”) and pretty ballads (“Neon Lights”) designed to ensure she keeps up with like-minded acts like Katy Perry and Christina Perri. 7:30 p.m., $29.50-$59.50. Quicken Loans Arena. (Jeff Niesel)