Diddy’s son Christian Combs goes all out for 21st birthday

Like father, like son.

Christian Combs, son of Sean “Diddy” Combs and the late Kim Porter, celebrated his 21st birthday at Miami hot spot Mandrake on Monday night.

The rapper was joined by his model girlfriend Breah Hicks, his older brother Justin, and a massive entourage for dinner, an insider tells Page Six.

At one point, Combs was shirtless as he cut into his oversized birthday cake in the restaurant’s garden, our spy said.

Combs showed off a “huge blingy watch” as guests sang “Happy Birthday,” and he spent the evening drinking straight out of bottles of Ace of Spades champagne.

“He was having the time of his goddamn life,” the insider added.

After dinner, the Dolce & Gabbana model made his way to Mokaï Lounge where Diddy was waiting to celebrate.

“My boy is 21!!! I love you so much,” Diddy wrote on Instagram that night.

We’re told Diddy gifted his son an all-gold jetski.

Other big stars who helped celebrate Combs’ birthday included rappers TyDolla$ign and Desiigner.