A 'concert girl' is a young woman known for attending many live music events, often dressing up elaborately for them and posting outfit-of-the-night content on TikTok. The 2023-24 stadium tours (Taylor Swift's Eras, Beyoncé's Renaissance) made it a cultural identity. If your teen calls herself a 'concert girl', she takes her gig-going seriously. Harmless and often joyful; only worth a conversation about budget if ticket-buying becomes financially stressful.