The Game: Celebs Give My Son Major Shout-Out ... For His 13th Birthday

The Game threw his son, Harlem Caron Taylor, a 13th birthday party that probably made his friends cry.

The rapper got a gaggle of celebs to shout-out birthday wishes ... Lil Wayne, Diddy, Kendrick Lamar, Kourtney Kardashian and Floyd Mayweather... and the list goes on and on.

Ray J also came through ... with custom Scoot-E-Bikes.