Rihanna Bares Her Butt in Thong, Thigh-High Boots in Topless Picture

USMagazine, Thursday, March 7, 2013, 6:00am (PST)

Two boots, one world-famous booty. For her latest envelope-pushing Instagram snapshot, Rihanna put on a very expensive pair of thigh-high boots -- and took off basically everything else to pose for a posterior shot to the delight of her 5.6 million followers on Instagram. Going topless and wearing a tiny thong, the River Island designer, 25, modeled a presumed freebie gift from beloved designer Miuccia Prada.

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"Gotcha bitch tip toeing on my marble flo'!!! Sick ass custom Prada boots! Miuccia you RULE!!! Thank you," Rihanna wrote. The outrageous boots could be a late birthday gift from Ms. Prada; Rihanna celebrated her quarter-century birthday on Feb. 20, vacationing in Hawaii with on-again boyfriend Chris Brown.

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Another piece of belated birthday swag? A vintage Chanel anklet featuring diamonds, which Rihanna also modeled via Instagram. As she grows older and wiser, the "We Found Love" singer is looking ahead to the next chapter in her life -- which she hopes includes children.

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She recently told ELLE UK "I will probably have a kid" in about five years. As for her and always-controversial Brown? "Now that we're adults we can do this right," Rihanna told the magazine. "We got a fresh start and we're thankful for that."

This article originally appeared on Usmagazine.com: Rihanna Bares Her Butt in Thong, Thigh-High Boots in Topless Picture