The 23-year-old singer was surprised with a cake while on set rehearsing for the show.
“my hairspray family surprised me and i had no idea what to do,” Ari captioned a cute Instagram video, which you can watch below. “i’m so lucky to be a part of this beautiful loving family and I want to smother you all. please always be a part of my life @nbchairspraylive thank you @neilmeron for the cake.”
Hairspray Live! premieres on December 7 @ 8 p.m. on NBC!