There are very few adults who would openly admit to having a SpongeBob SquarePants-themed birthday party. But even as he turned 41, Pharrell invited SpongeBob and some of his friends from Bikini Bottom Saturday to celebrate for an epic birthday party in New York City. 

After rocking a SpongeBob onesie at the 2014 Kids' Choice Awards last weekend, Pharrell threw a festive party at Cipriani Wall Street in New York City with the help of Nickelodeon. Celebrity guests included Alicia Keys, Swizz Beatz, Josh Lucas, Nicky Hilton, Soledad O'Brien and Q-Tip, who was the event DJ.

SpongeBob and his pals also showed up, including best friend Patrick, Squidward, Sandy Cheeks and Eugene H. Krabs. Pharrell's birthday cake was also appropriately in the shape of the Krabby Patty.

We can't help but feel jealous about not being there because by the looks of these photos, it appears that everyone is having a blast. It goes to show you that you can never be too old to feel young again!

Dimitrios Kambouris, Getty Images
Dimitrios Kambouris, Getty Images
Dimitrios Kambouris, Getty Images
Dimitrios Kambouris, Getty Images
Dimitrios Kambouris, Getty Images