Isn't she worried about bumping into ex-boyfriend Chris Brown ... OR his longtime lady love Rihanna?

Last night Karrueche Tran partied it up at Greystone Manor with a mystery dude pal, and the model showed off her tiny frame and her tattoos in a short skirt and cropped top. After getting her fill of dancing and drinks, she tweeted, "McDonalds midnight hour menu is genius." Sounds like someone had the late night munchies! Not sure where it goes though ... she's seriously teeny tiny!

Anyway, it sounds like Ms. Tran has been doing just fine since her split from Brown, as she's set to appear in Cassie's new music video for “Paradise," along with new dad Wiz Khalifa and Diddy. Can't wait to see that!

Karrueche Tran is baring her body and soul in the current issue of Rolling Out magazine.

Chris Brown's 24-year-old ex, wearing nude undies, admits that her relationship with the singer "was very hard" ... especially involving the love triangle with Rihanna.

As for the controversial romance, Tran tells the mag:

"The most challenging part about the attention was the negativity and the misconception from some people. People only see you in blogs and they think they know everything about your life. There are things that go public and everything that comes out is not the truth ... There was a lot of dysfunction and negativity. I just want to be happy."

The stunning model is now promoting her new clothing collection called The-Kill. Tran adds:

"Chris started his fashion line and wanted to start his women's line. He asked me to be the head of the line. I brought along Ugo Mozie and MiMi Gazelle as my creative team. Once people see the collection, they will understand our vision. It's a unisex line and it's only black and white."

Interesting because until now, nothing in the Chris Brown/Karrueche Tran/Rihanna situation has been black and white!

Chris Brown and Karrueche Tran are still friends despite their breakup. What a crazy situation!

The R&B singer left a Halloween party at Greystone Manor in LA rockin' some hardcore face paint ... and of course, making silly faces.

Moments after Brown left in his Lamborghini, Ms. Tran came out wearing an Asian-inspired outfit. She was busy covering her face and chatting on the phone.

Hmmm ... so is Rihanna fine with these two hangin' out or are all three parties involved cool with this scenario? Talk about cray!

The saga continues!

Karrueche Tran and her friends, including Chris Brown and Christina Milian, opted for a costume-free Friday night as they grouped up to grab a bite to eat at Wokcano in West Hollywood.

Reports surfaced that the one-time couple enjoyed a late dinner in a quiet section of the restaurant, which included a visit from Christina. It's been known that Karrueche still holds a flame for her former boyfriend despite his relationship with Rihanna, which will undoubtedly make things more complicated for the maligned trio. Let the drama begin!

Karrueche Tran and several gal pals hit Greystone Manor in Hollywood on Sunday, and despite all the drama with her split from Chris Brown, it looks like the model was able to shake it off, at least for the night.

Karrueche is reportedly fuming over the video Chris released last week, where he babbles about their breakup and loving two women at once, essentially telling the whole world that he dumped Karrueche for Rihanna. Can you blame her?

Glad to see her smiling!