Kris Allen opens for alt-rock band Lifehouse, which might seem odd, since Allen was last year’s American Idol, besting Adam Lambert for the title. But Allen has had nearly as much success since as he has obvious personality -- which is to say, not much. Meanwhile, Lifehouse has scored several top 40 hits over the past decade, from “Hanging by a Moment” to “You and Me” to “Whatever It Takes.” The band has proven to have staying power. Sunday, Oct. 24, at 7:30 p.m. D.A.R. Constitution Hall, 1776 D St. NW. Tickets are $42.25 to $50.45. Call 202-628-1776 or visit dar.org/conthall.