If you didn't know better, you might credit Sheryl Crow, above, for the quick sellout of US101's Heart Strings for Hope concert, set for 6 p.m. Tuesday, March 4, at the Tivoli Theatre. It certainly couldn't hurt to have an appearance by the megastar, whose last album was the country-flavored "Feels Like Home." But the annual concert, which showcases some of Nashville's best singers and songwriters, is a perennial favorite of local country music fans and it always sells out. Ticket sales are aided by the top-notch talent and heart-tugging beneficiary, the kids of St. Jude Children's Research Hospital. This year's lineup also features Jerrod Niemann ("Lover, Lover"), Randy Houser ("Boots On"), Tyler Farr ("Redneck Crazy") and Kelley Lovelace, a Hixson High School grad who's racked up multiple hits with an impressive roster of artists, starting with "He Didn't Have To Be," the song that launched Brad Paisley's career.