MTO WORLD EXCLUSIVE: Chris Brown And Rihanna Get Into A FIGHT!!!

: just got word from an EXTREMELY RELIABLE insider . . . two nights ago, Chris Brown and Rihanna got into a HUGE FIGHT – but luckily for them both, the fight was NOT physical.

According to our insider, the fight first started when Rihanna called Chris Brown and asked him to meet her at the studio. Chris refused, choosing instead to go out with his friends.

And since then, Rihanna called up Chris Brown at least a dozen times over the past two days – each time, she launched into a tirade of curse words.

To his credit, we’re told, Chris Brown has tried to defuse the situation. Our insider explained, “Rihanna is under a lot of stress [with her new album] and she wants [Chris] with her all the time. But Chris has his own stuff to do.”

The insider told, “[Rihanna] is very extra. She orders him around like ‘come here’ . . . ‘do this.'”’s insider added,”That sh*t used to work before [when Chris and Rihanna were together], but Chris is a lot older. He’s a man and so you can’t do him like that anymore.”

No word on whether the two plan on kissing and making up anytime soon.