Mo'Nique -- Blackballed or Not ... I'm Not Afraid of Lee Daniels (TMZ Live)

Mo'Nique just did something remarkable ... fearlessly speaking out about her feud with Lee Daniels -- one of the most powerful directors in Hollywood -- for claiming she's been blackballed.

The 2010 Oscar winner for Best Supporting Actress came on TMZ Live to reveal what went down when her "Precious" director Daniels -- who's also co-creator of "Empire" -- called her to say Hollywood execs think she's "difficult" ... and don't want to work with her.

Actors almost never take on a director in public, but this interview is different -- Mo'Nique did not back down to Daniels. As for what started the beef -- Mo'Nique thinks it's all because she didn't name drop someone during her Oscar speech. Check out the clip.