Rihanna Bisexual? Chris Brown's Ex Posts Sexy 'I Prefer My Pu$$y in Pink' Instagram PHOTO: Sparks Fan Love and Hate, RiRi 'Flirts' with Girls After Breezy Break Up?

Rihanna has once again caused an uproar on Instagram with a rather "controversial" post. This time, the "Diamonds" songstress posted a sexy, rather suggestive photo with the caption, "I prefer my pu$$y in pink." Okay then... does this prove that the ongoing rumors are true - is Chris Brown's former flame bisexual? Does it even really matter?!

On Sunday (July 28), RiRi posted:

badgalriri: "I prefer my pu$$y in pink."

Maybe she's just joking (the "Stay" songstress does have quite a naughty mouth on her). Still, the Instagram shout-out soon went viral, prompting much fan love (and hate):

tayrenee72: "Lmfao I luv this crazy broad."

leahbree80: "Can't buy class obviously!!!"

_lalaxo: "Lol love u riri. Fu#k a hater... tell dem basic bi#ches, get dat paper up."

therealcalvinborders: "YOU ARE A RATCHET H#E."

the0jay: "She's just having fun on top of the world. She's not asking to be anyone's "role model" leave her alone. If u don't like it don't taste it."

fatiyaa: "Cheap! Trashy! Classless!"

Hmm... sort of reminds us of those rumors about RiRi "flirting" with girls shortly after the infamous Breezy break up...

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

Rihanna 'Flirts' with Girls After Chris Brown Break Up [PHOTOS]: RiRi Sexy Party Twitter/Instagram Pics, Breezy 'Pursues' Ex Karrueche Tran?

Do Mstars fans have anything to say about RiRi's wild (and explicitly sexual) behavior?