I was genuinely surprised to hear she was only 16 when I saw the KCRW live promo. If I didn't know I would genuinely have said late 20s. Could 16 be her 'showbiz age'? I'm getting into her stuff though.
Like someone else said, it's an Adele-type situation. Much younger but presents herself as much older/mature to appeal to a wider demographic.
Most younger stars should take not of that tbh. They present themselves as little kids but then try so hard to prove they're "grown ups" as they get older.
I thought she was like 27 - 28 !