Chris Brown, Karrueche Tran Breakup Scandal! What Caused The Massive Public Blowup? Drake And Karrueche Tran Dating Once Again? [DETAILS]

MStars News has now learned why Karrueche Tran and Chris Brown have called it quits! It appears that Brown's Between the Sheets tour was the root of the celebrity couple's major breakup.

According to Hollywood Life, Karrueche wanted to spend all of her time with Brown during his tour and Brown wanted his space.

 SF 500

A photo posted by BREEZY (@chrisbrownofficial) on Dec 12, 2014 at 7:19pm PST

This site says that a source reported that Tran was worried about Chris cheating while on tour ... let's just hope it wasn't none of the Kardashian sisters, seen below.

Look who came to see me! Love them A photo posted by BREEZY (@chrisbrownofficial) on Dec 12, 2014 at 8:34pm PST

“Karrueche knows well and good that if Chris is left alone on tour, he’s going to not only get himself into some
sort of trouble, but she’s mostly worried his eye will be drawn to another woman,” the source added. “She wasn’t going to take that risk and told him straight up.”

The model wasn't happy when her now-ex-boyfriend replied, "He basically told her, 'Girl, you don't control anything. I do. Knock it off,'" according to the insider. "She left after that and they have been texting nasty things since she left and now it's all public."

MStars News previously reported that Brown made it clear that he was done with Tran, during the L.A. leg of his concert. Brown announced on video, "I'm single ... F--k that b---h."

Karrueche fired back in a short tweet: "Ni**as be in they feelings when you break up with them lol"

Niggas be in they feelings when you break up with them lol

— Karrueche Tran (@karrueche) December 6, 2014

Things became explosive when Brown posted a Instagram photo calling out Tran for participating in threesomes, secretly dating Drake and more when he wrote:

We've got scars, some of them u gave me, some of them I've caused. That ride or die act we have been fooling the world with obviously ain't working. I was locked up for damn near 4 months and only got 1 visit from you while u was hosting parties and taking secret trips to Toronto, going on dates with Drake! When this relationship first started u knew what it was and even participated in threesomes. I slowed all that shit down. So let's not try to save face for public opinion because I don't need to play victim so people can take my side. All these celebrity niggas ain't shit and focus only on themselves. I made it clear to the world who my girl was and made your life equal to mine even at the cost of me not focusing on my career at times. So miss me wit the bullshit. Now yall know the real." Fans everywhere started reacting to the major breakup, even telling Chris that sometimes he needs to "think before he speaks."

The post, the second one shown above, has since been deleted. Stayed tuned people — MStars News feels like the drama isn't over yet.