Maroon 5 and Kelly Clarkson of our powerful pop tour combo at the Jiffy Lube Amphitheater on Friday night. The popular band’s latest hit is “Love Somebody,” while Clarkson is touring in support of her recent “Greatest Hits” album. $46. 7 p.m. 7800 Cellar Door Drive, Bristow.
Books will be flying off the shelf at Potomac Community Library all this weekend — for a good cause. The library is hosting its book sale through Sunday, with used books, magazines, and audiovisual materials. 10 a.m. to 4 p.m. Friday and Saturday, noon to 4 p.m. Sunday. 2201 Opitz Blvd.
It’s a good time for a good cause at the Black Tie ^Breast Optional Gala Fundraiser on Saturday at Harris Pavilion in Manassas. Proceeds support The Ann Clarke Dollard Memorial Foundation that provides daily assistance to those battling cancer. $75. 7 p.m. Harris Pavilion, 9201 Center Street, Manassas.
The Wolf Trap hosts a live musical accompaniment to “The Lord of the Rings” in screenings on Friday and Saturday. It’s a chance to see Frodo’s epic journey out of the Shire, with a new twist. The performance includes a high-definition presentation of the film, with a full orchestra, chorus and soloists. From $25. 7:30 p.m. Friday and Saturday at the Filene Center, 1645 Trap Road, Vienna.
Members of eight tribes will be on hand for the Virginia Indian Festival on Saturday at Riverbend Park. The event will include the Rappahannock dancers and drummers, as well as hands-on activities and demonstrations, including storytelling, throwing spears and making stone tools. There will also be a marketplace with crafts and jewelry. $5. 10 a.m. to 3 p.m. at Riverbend Park, 8700 Potomac Hills Street, Great Falls.