Chrisean Rock Broke Up Tamar, Toni Braxton's Prayer Circle in James Wright Fight

Chrisean Rock's cameo at Tamar Braxton's L.A. concert seemingly started harmlessly -- she joined a pre-show prayer backstage ... and yet, violence allegedly broke out later that evening with Chrisean in the middle of it.

As you know, Tamar's backup singer James Wright ended up hospitalized after eyewitnesses claim Chrisean bloodied his face with a punch ... and a new video obtained by TMZ Hip Hop adds context to why things might have gotten heated.

Eyewitnesses on the tour tell us Chrisean burst into Tamar’s dressing room in the middle of the prayer and judging from everyone's reaction, no one expected her to be there!!!

You can see Chrisean not only breaking up the prayer circle, but also giving Toni Braxton a shove in order to get next to Tamar.

Chrisean's aggressiveness clearly disrupted Toni's concentration -- she refused to hold Rock's hand or even touch her as the prayer continued.

The encounter was Chrisean and Tamar's very first time meeting after Tamar had invited Chrisean to pull up to the show via IG Live.

We're told everyone backstage -- even James -- laughed off the prayer circle fiasco and made Chrisean feel welcome, even allowing her to stay backstage and do a pre-show shot with everyone in the room.

It was post-show where the mayhem went down ... Chrisean was under the impression she was supposed to perform during the show and things were said to turn extremely violent when James politely told her that wasn't the case.

Tamar hopped on Instagram for a teary-eyed live once the dust settled to name Chrisean as James' attacker, and clarify she was never scheduled to perform ... just assist in the twerk-off portion of the show.

James has yet to address the incident, but Chrisean denies it went down.