Bluegrass flatpicking phenomenon Rebecca Frazier and her band will perform at 6:30 p.m. Saturday at Flat Iron Crossroads in Gloucester. Doors open at 5:30 p.m. with the Island Time food truck and beer, wine, and soft drinks from the FIX Bar. Tickets are $20 when purchased in advance at flatironcrossroads.com. They are $25 at the door. Children 12 and under attend free of charge. Frazier, a Virginia native, gained notoriety as the first woman to grace the cover of Flatpicking Guitar Magazine, and in 2018, she became the first woman to earn a Guitar Performer of the Year nomination from the Society for the Preservation of Bluegrass Music of America. Her original songs range from hard-driving to thoughtful, emotive folk, said a press release, and her 2024 flagship album, “Boarding Windows in Paradise,” is “a tour de force album of bluegrass and acoustic roots music.” Acoustic band artists such as Béla Fleck, Sam Bush, and Stuart Duncan “flavor her music with the wisdom and grace she is st...