Call her crazy ... but Karrueche Tran and Chris Brown are full-on LIVING TOGETHER ... TMZ has learned.
Sources close to the couple tell TMZ ... they hooked up days before his 24th birthday earlier this month and she's been staying at Chris' Hollywood Hills home ever since.
Though she's keeping her own apartment -- smart -- she's already moved most of her clothes and other personal belongings to his pad.
And it's not like they've been secretive ... they've been spotted everywhere lately, hitting up the Billboard Awards afterparty and even rear-ending a Mercedes together.
Karrueche's one persistent scorned lover -- when Chris first dumped her back in October for Rihanna -- she vowed to win him back, as TMZ first reported.
So where does this leave Rihanna? RiRi and Breezy officially called it quits a few weeks ago ... but they've ALWAYS had an on-again, off-again relationship ... and Chris has made it no secret -- he loves 'em both.
Hey Karrueche ... you ever heard the expression, "Fool me once ..."
Dear Rihanna, Please provide Chris Brown frequent Instagram reminders of what he's no longer tapping -- such as your barely covered ass -- since he was stupid enough to break up with you. Love, The Internet (and everyone who uses it)
Check out TMZ on TV -- click here to see your local listings!
Rihanna just gave ex-boyfriend Chris Brown a little taste of what he's missing ... her perfectly sculpted ass.
RiRi just posted an extreme close-up shot of her nearly bare derriere in shorts that are so tiny, her THONG is hanging out of 'em.
Rihanna added a caption saying the pic was from the set of her new music video ... but we think it's pretty obvious the photo was for an audience of 1 -- Chris ... who was recently spotted out with his other sometimes-GF Karrueche Tran (who definitely doesn't have an ass like Ri).
With Rihanna in New York City on her Diamonds World Tour, Chris Brown celebrated his birthday at Emerson nightclub in Hollywood ... with ex Karrueche Tran in attendance.
We're told Karrueche -- Chris' other on-again/off-again girlfriend -- was invited by Chris himself to the party (thrown by ZING Vodka and Black Pyramid) to celebrate Chris turning 24. Our sources say the two still talk often and hang out, and that she still cares about Chris very much.
Here's to hoping some combination of these crazy kids can make it work.
Chris Brown might despise Drake with a passion, but even CB can't resist dancing when one of his songs comes on at the club.
Brown and Drake have been beefing for a while now -- peaking last June with a massive club fight, reportedly over Rihanna.
CB was hosting a party at Stage 48 in NYC earlier this month and apparently the DJ had no fear at all ... and played a Drake song, "Started From the Bottom." Rather than react (how do we say this nicely?) poorly ... CB simply got down like it was his favorite jam in the world.
Clearly he can let bygones be bygones when it comes to music ... or he had no idea it was a Drake song.
Chris Brown's own father has the same feelings as most of America does when it comes to his son dating Rihanna -- they should have NEVER gotten back together.
In an interview with the New York Daily News, Clinton Brown said that while he understand CB's attraction to RiRi, they are better off on their own. He told the paper, "I personally really didn’t want him and Rihanna back together."
The elder Brown, who split from CB's mom when he was 6, thinks the on-again/off-again couple does not have the proper balance to maintain a good relationship, explaining, "You have to have someone who is spontaneous and whimsical but you also have to have someone who is grounded and logical."
Clearly neither Chris nor Rihanna would be described as "grounded" or "logical."
Drake is holding nothing back about his feelings toward Chris Brown ... ripping CB over his music and the way he treats Rihanna -- and doing it in a very public forum.
Drake sat down with Elliott Wilson on his "Keep It Thoro" Internet radio show last night, and absolutely tore Chris a new one ... saying, "His insecurities are the fact that I make better music than him, that I'm more popping than him and that at one point in life the woman that he loves fell into my lap."
He added, "I did what a real n***a would do and treated her with respect."
Drake did leave open a slight chance for reconciliation, saying, "We have an issue and it's either gonna drag out or maybe in ten years we'll laugh about it over drinks. Just let us solve that s**t."
Ex-NFL star Chad Johnson was scolded for taking his domestic violence case lightly in court ... and now we have photos of his ex-wife Evelyn Lozada's face after the crime. It's a harsh reminder of how serious it was. Is Chad getting the message?Plus, rapper J. Cole is the…