Inside Mitchel Musso's 20th Birthday Party!

Mitchel Musso and his brothers Mason and Marc get ready to play some virtual baseball at his 20th birthday bash in Hollywood over the weekend.

Pals Debby Ryan, Kesley Chow, Bella Thorne, Kyle Massey and more played MLB 11: The Show on Playstation and watched the birthday boy blow out the candles on his Colossal red velvet cupcake from Crumbs Bake Shop.

The crowd was even treated to a special performance by Mason!

Guests also enjoyed taste-size Crumbs cupcakes and received gift bags which included a PS3 while listening to the sounds of DJ Michelle Pesce.

Other guests included girlfriend Gia Mantegna, and costars Ryan Ochoa and Doc Shaw.

10+ pics inside…