The YouTube star held her big party on Tuesday night at The W Hotel in Hollywood. The event will be part of a Nickelodeon special entitled, "JoJo’s Dream Birthday," set to air on Saturday, May 18, at 8:00 PM. JoJo doesn't actually turn 16 until next month.
Wearing her signature giant bow and nothing but neons and sparkles, North and her BFF Ryan looked ecstatic to stand next to JoJo.
The two go way back, as in last week. North is a well-documented fan of JoJo and they were seen filming an upcoming special together for the former dancer's YouTube channel.
While North was the spitting image of her idol, Penelope showed her own style wearing a rainbow sequined sweatsuit with her adorable bob.
But the famous "KUWTK" cousins weren't the only famous guests at JoJo's sweet 16.