Karrueche Tran implores ex-boyfriend Chris Brown to "man the f**k up" in a blistering new Instagram post, where she also tells the "Loyal" singer they're no longer together because of his lack of loyalty.

The 27-year-old model and actress' comments were sparked by a recent interview Brown did with Ryan Seacrest where he admitted he "still loves her."

The two recently split after it was revealed Brown had fathered a child with another woman behind her back.

"First off @chrisbrownofficial you just did an interview w Ryan Seacrest in which you spoke about me," she wrote on Instagram. "My interview w Access Hollywood was not entirely about you.. they asked a question and as a mature adult I answered. I'm not gonna shy away from something that I lived through. I'm talking about my life and experiences. I'm not speaking on you or bashing you (like I easily could). Don't be mad at me because our relationship is over due to your lack of loyalty."

Tran explained that his trying to get into his car and sending her gifts are proof that he needs to grow up.

"You know what's weak?? You forcing yourself into my car.. my broken window.. blowing up my phone.. trying to shower me w gifts..," she said.

But she does try to end the note on a positive thought. The model wishes him look with his daughter, Royalty.

A photo posted by karrueche (@karrueche) on Jun 14, 2015 at 2:48pm PDT

In recent times, TMZ has reported the 26-year-old Brown has pulled out all the stops in hopes of winning his ex-girlfriend back, including jumping in her car to talk to her and showing up at her home uninvited at all times of the night leading to cops being called.

"I can't promise anything, and I can't jump over the moon, but it takes time for all wounds [to heal]," Brown told Seacrest during their interview. He added he takes full responsibility for his actions and now just wants to be the best father he can be.

And still, Karrueche wasn't hearing it.

On the night the two came face to face at a Hollywood club, Tran stormed away in an effort to avoid Brown. As he persisted in trying to corner her, she left little impression that she would be intimidated.