Kendall, 16, and her 14-year-old sister debuted their new looks as they took Kendall's Range Rover to be washed.

Kim had earlier tweeted Kendall saying: 'Don't blondes have more fun @KendallJenner?!? LOL.'

As the younger half-sisters of Kim, Kourtney and Khloe Kardashian, Kendall and Kylie Jenner are known for toms sale shoes their glossy, dark brown hair.

But yesterday the pair decided to try out a new look, stepping out in Calabasas, California, with long blonde locks.

But as her fans were quick to question her decision to make such a drastic change to her appearance, Kendall came forward to admit she had just been wearing a wig, as had Kylie.

She shared a picture of her normal brown hair, captioning it: 'Don't worry! Still a brunette!

Kendall's sister Kim also shared the picture of her blonde sibling on her page, writing: 'It’s just a wig, but doesn’t Kendall look great as toms sale a blonde!?!

'It’s fun to experiment with different looks some times… even if it’s just for the afternoon! lol.'

As the girls showed off their new looks yesterday, Kylie opted for a cute and casual look in a pair of skinny jeans, UGG boots and a blue sweater.

Both sisters looked in good spirits on their day out, despite a difficult few weeks after their Chihuahua Dolce went missing.

Kendall and Kylie used their fame to appeal for help locating the pooch, and Kendall told E! News asos discount code earlier this week: We still can't find him. We've had him for like 10 years.

'He was staying with our friends for a little while. They've been friends for a long time ago and they really loved him...and then he got out.'