On a comeback tour after recovering from an eating disorder, 19-year-old Demi Lovato has matured since her days on Barney & Friends and has put forth her third studio release, Unbroken, an album of brazen ballads and freak dance music. Her performances on this tour have been affirming but unpredictable, and the Lovatics — the name for her throngs of fans — totally relate. A recent optimistic New York Times concert review noted that she was prone to interrupt songs to make gushing public service announcements to the girls in her audience who, she can tell from experience, think themselves to be extremely unpretty or somehow not pretty enough. Demetria Devonne Lovato is coming to the Midland (1228 Main, 816-283-9921) to tell you that you are, in fact, beyond pretty and extremely strong. The show starts at 7:30 p.m. Tickets cost $39.50-$49.50.