The 25-year-old rapper splashed out on a red Mercedes G-Wagon for the birthday girl, who hits the milestone on Monday (10.08.15).
And Kylie was clearly thrilled by the gift as she drove it straight to Nobu in Malibu, where she partied with Kris and Caitlyn Jenner amongst others, gossip website TMZ reports.
Meanwhile, sister Kendall Jenner previously admitted she was ''scared'' about her younger sibling turning 18.
She wrote on Instagram: ''Weekend vibes #KyliesTurning18ImScared. (sic)''
And the 'Keeping Up With The Kardashians' star is set to cash in with her birthday celebrations after it was previously revealed she will be paid over $100,000 to celebrate her birthday at the Beachclub Montreal in Canada.
Club owner Olivier Primeau is also said to have organised for the 17-year-old beauty to be treated to a trip on a luxury boat as well as a pricey $3,000 birthday cake.
And Kylie is looking forward to heading out for the first time ''legally'' without a chaperone.
She said: ''What the first thing I want to do is maybe have like a birthday party and then maybe go on a trip with just my friends. I'm legal, so I can go on a trip legally without a chaperone, so that'll be fun, just a girl trip.''
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This news certainly puts a smile on our faces.