But the pair showed they were certainly good sports as they made the most of the experience following Kanye's Ready-To-Wear Fall/Winter 2012 show during Paris Fashion Week yesterday.
Donning helmets and lowering themselves gently into the carts so as to not damage their outfits, Kim and Katy looked as though they were having a whale of a time as they sped around the track.
On your marks! Katy Perry looked like she was having a whale of a time as she enjoyed a go karting experience at the Kanye West fashion show afterparty
Having fun? Kim Kardashian raced Kanye, with the designer apparently beating his reality star pal on the course
Kim also didn't let her Kanye West for Guiseppe Zanotti heels, made of calf leather and embroidered pearls and cost around $6,000, get in the way of her karting experience.
Earlier she had tweeted a picture of the shoes with the caption: 'I j'adore my shoes tonight!'
While Katy went solo on the course, Kim raced Kanye and appeared to lose to the rapper-turned-designer, judging by a picture which showed the musician with his hands up celebrating his victory.
Not the easiest shoes to speed in!: Kim posted this photo to her Twitter page along with the caption 'Go-karting in heels ain't easy...'
Ready for action: Kim lost her fur cover-up in the kart, but kept on her $6,000 heels