Katie Gavin, best known as the lead singer of MUNA, opened the evening at Boston’s MGM Music Hall on Monday, April 21st, with a captivating solo set that introduced fans to her evolving artistry. Performing selections from her debut solo album, What a Relief, Gavin traded MUNA’s synth-pop textures for a sound rooted in folk and country influences. Her set was rich with emotional nuance, featuring warped-sounding keyboards, twangy guitars, and vocals that evoked the raw spirit of a pre-Fleetwood Mac era Stevie Nicks. Tracks like “Inconsolable” and “As Good As It Gets” stood out for their lyrical weight and vulnerability. Gavin’s engaging stage presence and introspective storytelling created an intimate atmosphere that primed the crowd for what was to come. Following Gavin’s poignant opener,...