The "We Found Love" singer tweeted the photo of the new mom decked out in full makeup with her golden blonde hair done in bombshell waves and her ample cleavage on display, reported Us magazine.
"This pic could single handedly destroy the self esteem of an entire nation," Rihanna, 24, tweeted of her 30-year-old music industry colleague, whose husband Jay-Z is Rihanna's mentor and label mate.
Rihanna isn't the only star who's been girl crushing on the "Love on Top" songstress, who gave birth to daughter Blue Ivy in January.
On August 2, actress Rashida Jones tweeted in excitement after catching a post on Beyonce's Tumblr with the handwritten words "Inspiring woman!" next to the actress' photo.
"WHA??? ALL-TIME CAREER AND LIFE HIGHLIGHT. Thank you, Beyonce, you're a goddess." Jones, 36, wrote.
And in true goddess fashion, Beyonce is quick to recognise the women whom she admires, including First Lady Michelle Obama and US gold medalist gymnast Gabby Douglas, 16. "Thanks for inspiring all of us!" she wrote after Douglas' Olympic victory.
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