tmz.com–Flo Rida made a rich Jewish boy very happy last Sunday — because the rapper DOMINATED the kid’s Bar Mitzvah … with an incredibly awesome performance.

According to our chosen sources, Flo played a full hour at the Shaar Hashomayim synagogue in Quebec — yes, there are Jews in Canada — and got the pubescent crowd AMPED with a full list of hits … like “Get Low,” “Who Dat Girl,” “You Spin Me Round.”

He was back in L.A. today — but he wouldn’t comment on how much he got paid at the coming-of-age ritual … telling us, “Gotta keep that on the low, low, low.”

Watch Flo performing at the party here.

Tmz.com caught up with Flo after a workout here.