Kylie Jenner bought her friend a $70,000 car for her 18th birthday.

The 'Keeping Up with the Kardashians' star splashed out on a black convertible Mercedes-Benz for Jordyn Woods, who reached the milestone age yesterday (23.09.15) as a thank you gift for her ''selfless'' pal.

Sharing a picture of the vehicle on Instagram, Kylie wrote: ''happy birthday jordyn. Thank you for being you. Most down to earth selfless human being! I hope you enjoy it (sic)''

And Jordyn was left stunned by the generous gift.

She also shared a photo of the car and wrote: ''There's no words to describe how I feel.. I just don't know what I did to deserve this. I can never thank @kyliejenner for motivating me to always do my best and always opening up new opportunities. Do good and good things will happen. Blessed and grateful always. Love you and thank you again to everyone who made me feel special on this 18th year (sic)''

As another birthday treat, Kylie, 18, arranged for celebrity nail artist Britney Tokyo to be a part of the birthday celebrations.

She wrote: ''Thank you @britneytokyo for coming to the house today to do our nails for Jordyns birthday! I love my Barbie nails (sic)''

Despite her kindness, the reality star has also faced criticism after Jordyn revealed her ''friends'' had served her a birthday cake which bore the words ''Happy Birthday N***a''.

However, Kylie insists the controversial sweet treat had nothing to do with her.

She shared a picture of a different cake and wrote: ''My cute little cake to Jordyn the other day. The other one was not my gift.''