MTO EXCLUSIVE: Love And Hip Hop REUNION Drama . . . Hazel CRASHED The Reunion . . . And PUTS HANDS On Masika!!! (Find Out WHO WON . . . INSIDE)

The Love & Hip Hop: Hollywood reunion show was filmed yesterday - and it was explosive.

According to multiple people in the audience, an UNINVITED GUEST stopped by - Hazel E. And she was ready for battle.

An insider with production told MTONews, "Hazel E came out of nowhere and immediately went at Masika. I kind of felt bad for [Masika] because she spent all day arguing with Brandi. Moniece got in Hazel's face and Hazel [MUSHED] her."

We're told that production may have to edit out the "mush" scene - so as not to upset any of the sponsors.