The Game got on his soap box at his birthday party … grabbing the mic and telling the world to free Diddy and R. Kelly … and then he started talking baby oil and urination … and it’s all on video.

TMZ obtained footage from The Game’s Friday night birthday bash in Hollywood, and you hear him voice support for a couple of infamous musicians … Diddy and Kelly.

The Game gets bolder and bolder as he spouts off into the mic … making light of all the baby oil and urination aspects of the Diddy and Kelly trials … as some R. Kelly music starts to play.

He then adds … “Free all the freaky homies!!!”

Seems like The Game was having a helluva night … other videos from the same club show him smoking and dancing with his friends.

Diddy may be free before long … he’s confident he’s getting a presidential pardon from Donald Trump sooner than later … though his release date is not far off on June, 2028.

Kelly is likely looking at a longer time behind bars, despite what The Game is saying here … it appears Kelly won’t be free until 2045 when he’s 79.