Rihanna 'Dumps' Chris Brown for Partying with Karrueche Tran? Breezy 'Back Together' with Ex, RiRi Single? Rocky Duo Talk 'Love' on Twitter

Rihanna's rocky relationship with Chris Brown is apparently over yet again (at least for now). From Breezy un-following RiRi on Twitter, the "Diamonds" songstress re-following Brown's bitter frenemy Drake on Instagram, and the duo partying nonstop (separately), things seemingly weren't working out romantically between the couple. And the fact that Breezy celebrated his birthday over the weekend with ex Karrueche Tran apparently left RiRi with no choice but to dump him. Is Brown officially back together with the lady that he initially broke up with to rekindle a flame with Rihanna? And if the Barbadian beauty is single again, what does that mean for her already hard-partying ways? Both Breezy and RiRi recently hit up Twitter to discuss the "pitfalls" of love... Read on for more details!

Rihanna's been busy touring (and partying) on her "Diamonds" world tour... sans-Chris Brown. Check it out:

Rihanna Sexy Butt, Thong PHOTO: RiRi 'Friendly' with Drake on Instagram to Make Chris Brown Jealous? Cheating, Break Up Rumors Swirl

Rihanna Cheats on Chris Brown with Girl? PHOTOS: RiRi Partying, Cuddling with 'Open Lesbian' Amid Breezy Break Up Rumors, Flirty Tweets

Rihanna 'Kisses' Mystery Man, Chris Brown Break Up Rumors: PhotoS, RiRi Parties Hard: Karrueche Tran, Jordan Sparks Better Breezy Match?

But apparently Brown's been having some fun of his own... with ex-girlfriend, Karrueche Tran. The stunning model showed up to Breezy's birthday bash on May 3 in LA... just days after they were spotted partying together in NYC. And allegedly, RiRi was not amused. An "inside" source tells Hollywood Life:

"When Chris was in NYC celebrating a friend's birthday, Rihanna found out that Karrueche was in town. She found out that they met up and saw each other and so she dumped Chris... Rihanna was supposed to take some time and go to Vegas for his birthday before that all happened... Chris is back with his ex-girl and Rihanna is single."

Still, another source insists the break-up won't last long (like always) - "They ain't never going to be done... They're just coolin it right now. There's always going to be love there. That will never change. But sometimes its better to take a break and get back to the basics." 

Brown recently tweeted:

@chrisbrown: "People sometimes...... Sometime loving someone is too much! So loving from a distance will help everyone grow! Be blessed. Live ya life!"

Just hours later, RiRi wrote:

@rihanna: "Settling is not an option! Nothing less than 100% loyalty, honesty, and respect!! Love ain't for kidz #butimsleeptho."

Hmm... stay tuned for more relationsip drama!