Most people don't have a birthday in Vegas 'til they turn 21 -- Diddy's kid did it at 12.
Christian Combs, Sean "Diddy" Combs' son, had his 12th b-day at Lavo Restaurant in The Palazzo last night -- with Tyson Beckford's son Jordan, Faith Evans' kid Josh and Master P's boy Hercy.
We're told the kids chowed down on spaghetti and Kobe meatballs, filet mignon and shrimp scampi before cutting open that cake.
Diddy made the b-day toast, but not with Ciroc or champagne -- these guys were all drinkin' Shirley Temples.
