Kylie Jenner will give away a free Kymajesty Lip Kit to every customer to celebrate Halloween.

The 19-year-old 'Keeping Up With the Kardashians' star has revealed she is giving all customers who make ''any purchase'' from her cosmetics e-store Kylie Cosmetics on Monday (31.10.16) a complimentary ''metal lipstick''.

The beauty mogul - who launched her own cosmetics brand earlier this year after two years of working on the company - announced the news via social media.

Alongside a picture of the blue, black metallic shade, which was shared on the company's Instagram account, it read: ''Tomorrow only, get a free #Kymajesty metal lipstick while supplies last with any purchase from! Starts 12.01am pst Monday, ends MIDNIGHT! Happy Halloween! (sic).''

Meanwhile, the teen entrepreneur has revealed she has received complaints from people who thought they were buying her lip liner and lipstick duos, but were being scammed by other websites who have reproduced her products using ''dangerous'' ingredients.

Speaking previously in a string of Snapchat videos, the television personality said: ''The ingredients in these products are also really really dangerous, which is my biggest concern.

''I feel responsible to give you guys a warning that there are people out there who are trying to steal your money and I just want you guys to have the very best.

''What is this? We really got into the ingredients and they're so bad for you.

''So someone just tweeted me one of their fake products and they said it has glue in it. Glue in it people.

''I don't sell to anybody else, the only way to get my products is from my website.

''Make sure you guys check the URL because these other websites are making fake product, it might look exactly like mine but it's not mine.

''This is getting so out of hand people, please, please, please, don't trust any other website.

''So I want to be really really clear, and let you guys know the only place to get my products is''