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One holds the title for the most beautiful woman in the world, the other has been named the sexiest woman on the planet. But is it Beyonce or Rihanna who's the sexiest of them all? Take a look at the evidence and tell us who you rate more...
Beyonce's stage wardrobe staple is the spangly minidress which shows off her famous booty. She wore it proudly for her record breaking performance on Glastonbury's world famous Pyramid stage back in 2011.
Rihanna is equally unafraid to show off her figure with skimpy tour outfits, including this tiny black leotard complete with black fishnet stockings.
Beyonce left little to the imagination in this teeny weeny red corset compete with stockings, suspenders and satin gloves.
Rihanna's stage outfits have also included sexy black suspenders and stockings.
Beyonce was at her natural best during a overshoot for People magazine, who recently named the star the world's most beautiful woman. Picture: People Magazine/www.people.com.
Rihanna posed for the cover of the edition of Esquire magazine which named her the world's sexiest woman in a couple of soggy leaves, and not much else. Picture: Russell James/Esquire.
Beyonce recently let the world peek into her private family album when she released a series of pictures of her summer holiday. Picture: Beyonce.Tumblr.com
Rihanna has also shared private moments with her fans, posting a series of pictures of her European holiday on her Facebook page. Picture: Facebook.
Beyonce's natural hair is big and bouncy, but she's also played with straighteners and a host of colours from white blonde to pillar box red.
Rihanna's experimented with all shades of red, blonde and brunette, and all styles from long and sleek, short and shaved and long, loose and natural as pictured here.
Beyonce's booty does the talking on the red carpet.
Rihanna is a strong contender for queen of the red carpet, opting for sweeping gowns in classic cuts which show off her natural curves.
Beyonce's album cover featured the singer topless on a beach with combed back wet hair.
The artwork for Rihanna's 'Loud' album showed a close up of Rihanna with bright red lips and hair to match.
Beyonce - a regular at New York Fashion Week - showed off her pregnancy curves in a gold dress at the 2012 spring shows.
Rihanna stunned in a slinky green gown at Stella McCartney's London Fashion Week show in 2012.
Beyonce went blonde and dazzled in gold costumes in her video for 'Run The World (Girls)'.
Rihanna's video for single 'S&M' was one of the singer's sexiest to date. Picture: Facebook.
Beyonce wowed photographers at a restaurant in New York on one of her first night's out since giving birth.
Rihanna is all smiles for the paparazzi who follow the singer's every move.