Karrueche Tran broke down in tears while opening up about her relationship with ex-boyfriend Chris Brown.

The 26-year-old beauty publicly announced she was splitting from the 'Loyal' hitmaker for good earlier this month after it was revealed he'd fathered a daughter named Royal with their mutual friend Nia Amey, and she gets emotional in a preview of her upcoming interview about their split on the Oprah Winfrey Network (OWN).

The model was interviewed by OWN host and life coach Iyanla Vanzant and will be seen in tears as she responds to questions about her on/off boyfriend of more than four years.

In a preview for the upcoming show, Iyanla can be heard telling her: ''He betrayed you. He lied to you. He did it all publicly.''

She then begins asking probing questions as Karrueche visibly struggles to put into words her feelings about the 25-year-old star.

Iyanla says: ''How did you find out that he had a baby by another woman?

''Have you spoken to him? What I want people to know about Chris Brown is ...?''

The dramatic teaser for the interview ends with the 'Iyanla: Fix My Life' star saying: ''Here comes the hard question...''

An advert for the show promises to ''set the record straight'' about the couple while showing ''a side of Karrueche that has never been seen before''.

The news that Chris has a nine-month-old baby is said to have completely blindsided his former girlfriend.

She took to Twitter after the news broke, writing: ''Listen. One can only take so much. The best of luck to Chris and his family. No baby drama for me. (sic)''

The exclusive interview will air on OWN on Saturday (28.03.15) at 8pm.