Rihanna Wardrobe Malfunction PHOTO: 'Lady Parts' Go Viral on Twitter, Fan Posts Racy 'Upskirt' Image of RiRi in Sexy, Skimpy Bikini

On Monday (March 25), one Rihanna fan posted a rather revealing image of the "Diamonds" songstress on Twitter - the image shows RiRi lounging in a sexy, skimpy bikini, with most of her private lady parts totally exposed. This is not the first time the Barbadian beauty has showed up semi-nude on popular social networking sites... but do Mstars readers think this Twitpic goes a little too far?

Several fans are still debating the authenticity of this explicit RiRi image... there's a chance that it could be photoshopped or altered in some way. Check out the NSFW photo originally posted by Bidi Bop/Sa1lorgoon here.

Apparently this photo was taken during one of Rihanna's infamous yacht/Caribbean vacas.

And here are some Twitter fan reactions:

@thugpop21h: "I'm confused what's wrong."

@thugpop: "nothing @ all it's the perfect pu##y."

@Afiyaaaa21h: "what! That's real?"

@SA1LORGOON: "real AND magical."

@Afiyaaaa21h: "Lmao, saves and favs."

Do fans think the RiRi "nether regions" snapshot is legit? Or do readers much prefer the intimate pics posted by the pop princess herself...

Wonder if RiRi's on-and-off again beau Chris Brown approves? Mstars knows of one person who doesn't... Rihanna's mom...