LeBron James: Secret VIP Party with Drake ... And David Blaine?!

LeBron James, Draymond Green, Kevin Hart and more hit up a secret VIP party for Drake Thursday night in Toronto ... complete with a celebrity DJ and DAVID BLAINE doing magic ... TMZ Sports has learned.

It all went down at Frings -- owned by one of Drake's good friends -- and we're told the party was strictly invitation only.

We're told the party was to honor Drake -- who's getting the key to the city this week ... as part of the kickoff to NBA All-Star weekend.

We're told the coolest part of the party was that legendary street magician David Blaine was basically the entertainment ... doing insane tricks for people throughout the night.

With all the huge NBA stars and celebs coming to town -- we're told it's supposed to get wild in Toronto this week.

Stay tuned ...