Foster Sylvers, the 1970s child star, is trending after a deeply ironic clip resurfaced where he cheerfully sings “I’m a grown-up now” from the Sylvers’ hit “Boogie Fever,” while wearing a short-sleeved button-up that looks like a 12-year-old raided a dad’s closet—proving that growing up is just a costume party, and he’s the only one who got the joke.