EXCLUSIVE: Mel B Talks 'AGT' Spat With Simon Cowell & Her Emotional Connection to Contestant Evie Clair

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Mel B had one dramatic night on Tuesday's America's Got Talent live show, when she and judge Simon Cowell got into a bit of a quarrel that led to the former Spice Girls star tossing her water in his face.

ET's Denny Directo caught up with Mel B backstage after the show, where she opened up on her frequent clashes with her fellow judge.

"He should know, if you say something inappropriate he's gonna get like, stuff thrown at him," she explained.

"In a friendly way," she added quickly. "I made sure there was no ice in it this time… just fizzy water."

The tete-a-tete went down after a performance from the death-defying escape artist Demian Aditya, whose insane stunt was marred by technical difficulties that essentially ruined the trick and left the judges underwhelmed.

"I kind of imagine this would be like Mel B's wedding night," Cowell began when it was his turn to give feedback. "A lot of anticipation, not much promise or delivery."

Before he could get to his punchline, the 42-year-old singer -- who is in the middle of a contentious divorce with her ex, Stephen Belafonte -- stood up and aggressively threw her cup in Cowell's face, soaking his shirt and hair, before storming off stage.

This isn't even the first time this season Mel's thrown her drink at her fellow judge. During the audition rounds, Cowell joked that she'd managed to get famous without knowing how to dance and ended up getting soaked.

As for Tuesday's incident, the singer said she only had one regret: "I just [wish] I would have had cranberry juice in there or something, and then his whole body would be really sticky!"

After their confrontation, the two judges shared words during the commercial break and were able to move forward before the next performers took the stage.

"I told him he was an asshole and that was it, and he goes, 'Oh, whatever,'" Mel B recalled. The two have always butted heads throughout their time on the show, but the singer said her goal is to always make sure to put the performers first and personal drama second.

One contestant who connected very personally with Mel was 13-year-old singer Evie Clair, who delivered a touching rendition of "Wings" by Birdy, while playing the piano.

The young singer has been using music to comfort her father, who is battling stage-4 colon cancer, and her emotional struggle struck a chord with Mel, who lost her own father to cancer in March.
 
"When you lose somebody, you don't really expect to be in the same situation as somebody else when you're on live TV, and they're going through the same thing," she shared. "So when her story came up again, I'm like, 'Oh my gosh, that's very similar to mine.' I wanted to put the story aside and just focus on her voice, but it all just collided. Thank god she has such a beautiful voice."

To see which of Tuesday's contestants make it into the semi-finals, tune in to the America's Got Talent results show on Wednesday at 8 p.m. ET/PT on NBC.

Mel B's love life was also thrust into the spotlight last week when Cowell and Howie Mandel made several jokes about her newly single status. Check out the video below to hear more.