Rihanna is one of the sexiest women on the planet. From her long legs -- they've been insured for $1 million -- to her slim frame, which gives her the ability to wear practically anything (or nothing), it's no surprise that the Bajan beauty can easily land a magazine cover or top those "Sexiest Woman Alive" lists.

While many female stars unleash their inner sexpots in private, Instagram has proven that, like Nicki Minaj, this 25-year-old songstress isn't shy about showing off her risque side. From lounging by the pool in an itty bitty bikini to taking a sultry toke of the marijuana smoke on 4/20, here are the 10 Hottest Instagram Photos of Rihanna.