Leslie Mann may have rang in her 48th birthday on Thursday, but she's feeling 15! To mark her special day, the actress celebrated by having a dance party with her family including husband Judd Apatow and their two daughters, 22-year-old Maude and 17-year-old Iris. "I turned 15 today??," Leslie wrote on Instagram. In the video, the brood is shown wearing colorful t-shirts with Leslie's face on them as they dance along to The Weeknd's "Blinding Lights," and the choreography is just too good! Perhaps they've been watching Justin and Hailey Bieber's TikTok videos and felt inspired? Please do yourself a favor and watch the video above now.