The curvaceous stars were pictured walking arm-in-arm at the Metropolitan Museum of Art in New York, and both were in show-stopping and flesh-bearing sheer embellished frocks.
Keeping Up With The Kardashians star Kim, who arrived with rapper husband Kanye West, shared the backstage photo with fans via Instagram.
Captioning the photo, she said: "With my idol @jlo."
Mum-of-one Kim also told fans that 'All Day' rapper Kanye had taken the bottom photo.
Both J.Lo and Kim flashed the flesh at the prestigious gala, embracing the theme, China: Through the Looking Glass.
While Kim debuted Peter Dundas' work as the creative director of Roberto Cavalli in the embellished feathered trail number, 'Booty' singer Jennifer looked red hot in a beaded Versace gown.
J.Lo was one of the original booty queens, but in recent years, Kim's pert and toned derrière has become the talk of celebville.
So, the real question is, who has the bigger booty?!
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Check out all the stars at the Met Gala below:
Copyright: Rabbani and Solimene Photography/Getty Images
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