The "Diamonds" stunner's BFF Melissa Forde shared this nearly naked Instagram shot of her pal. "Sneak peak new photoshoot @badgalriri #MTFphotography," she wrote. RiRi later confessed her mother seriously disapproved of the über-sexy snap.
The singer snapped this super sexy selfie, showing off her toned and trim physique. "Oh baby I'm a Roc StaR," she captioned the pic.
The sassy songstress celebrates the success of her MAC lipstick, RiRi Woo, which sold out in just three hours. "@mforde11 making me cake," she captioned the sexy shot.
The superstar flaunts her enviable backside (and fabulous life) on the social media site. "#Monaco #YachtLife #BoatzNHeauxz @charlieybymz I finally put this bad ass piece on for your Birthday!!" she wrote.
The 25-year-old beauty enjoyed a topless moment while prepping for a performance in Atlanta. "Show time!! #DWT," she posted.
The Barbadian beauty paid tribute to her grandmother on Instagram, who lost her battle to cancer in June 2012. "Wrist to wrist!!! #grangrandolly," she captioned the precious pic. After Dolly's death, she donated $1.75 million to a Barbados hospital in honor of her late grandma.
RiRi clearly loves her galpals and is constantly posting pics with her best friend Melissa Forde. "Best heauxz 4 life yo!!! @mforde11 Shout out to my baby daddy @riccardotisci16 for my 3 piece trillness!!!#givenchy #Saturdayz," she wrote. Don't you wish you could hang with these two?!
And this is how Rihanna lets her followers know she's back together with on-again-off-again beau Chris Brown. "i dont wanna leave!!! Killed it tonight baby!!!" she wrote.
Or, um, girls. Whatever works. "I'm an outlaw bitch!!" the sassy songstress captioned this shot.
The performer shared this snap after her chance encounter with The Hunger Games star. "Bumped into the extraordinary Jennifer Lawrence at dinner! #Paris," she wrote.
Clearly, the singer isn't afraid to flaunt her love for marijuana. "I'm just a girl... #Amsterdam," she posted.
RiRi captioned this pic, "View from under my visor." How creative (and cleavage-enhancing)!
NEXT GALLERY: Rihanna's Sexy Twitpics