It was a sweet night for JoJo Siwa.
While her big 16th birthday is still a month away, the Dance Moms alum and YouTube star got the celebrations started early with a birthday party at the W Hotel in Hollywood.
Famous faces like reality star kids North West and Penelope Disick were in attendance, as was fellow YouTuber Colleen Ballinger and Dance Mom Abby Lee Miller.
Judging by the guest list, friends of all ages got to have fun at Siwa's dream soirée, hosted by Nickelodeon. The event will be part of a Nickelodeon special, JoJo's Dream Birthday, set to air on May 18 at 8 p.m.
There was also no shortage of spectacle as a marching band made its way through the party and guests munched on sweet treats, including cotton candy.
It seems no detail was left behind for the sweet 16 birthday girl.
While the wait is officially on to see exactly what Siwa had in store for the big night, check out the adorable red carpet arrivals in E!'s gallery below:
Ryan Romulus, North West, JoJo Siwa & Penelope Disick
JoJo caught up with her pint-sized reality star fans.
Abby Lee Miller
The Dance Moms star was smiling from ear to ear.
Abby Lee Miller & JoJo Siwa
The Dane Moms alums posed together with big smiles.
Colleen Ballinger & JoJo Siwa
The fellow YouTubers held up peace signs for the cameras.
Jodie Sweetin, Beatrix Carlin Sweetin-Coyle & Zoie Laurel May Herpin
The Fuller House star had a fun night out with her two daughters.
North West & JoJo Siwa
The birthday gal got a hug from Kim Kardashian's famous daughter.