Catch LeAnn Rimes in concert this weekend and support the Cystic Fibrosis Foundation at the same time. The 20th annual concert to benefit the foundation will also feature The Hard Travelers, a Maryland folk group. The concert starts at 7:30 p.m. at 1st Mariner Arena, 201 W. Baltimore St. Tickets are $27-$69 and can be purchased at ticketmaster .com.