International touring musician Mean Mary will appear along with her brother Frank James this Saturday at Flat Iron Crossroads in Gloucester. The concert will begin at 6:30 p.m. Doors open at 5:30, with the Shore Bites food truck and beverages from the FIX Bar. Tickets are $20 online at flatironcrossroads.com. This special performance will be part of Mean Mary’s “Woman Creature Tour,” said a press release, adding that the artist’s songs “travel the genres of roots, bluegrass, blues, and folk rock.” She is known for her “lightning-fast fingers, musical storytelling, and raw, unmistakable vocals,” said the release.