She has barely just turned 18, but Kylie Jenner is already planning a second beauty line to go alongside her hugely successful hair extensions range.

The teenage reality star took to Instagram yesterday to tease her newest project – a lipstick kit – but the reaction hasn't been all that positive so far. Posting a picture of herself with her distinctive plump pout coated in brown lipstick, Kylie wrote, "Brown lips #KylieLipKit stay tuned."

 

A photo posted by King Kylie (@kyliejenner) on

Considering that Kylie's ascent to superstardom over the last 18 months has largely been due to a complete image overhaul starting with her lips, it's no surprise that Kylie is trying to cash in on the plump pout that made her famous.

However while a lipstick kit is not exactly a scandalous product for a teenage celeb to endorse, the fact that Kylie's own lips are the result of cosmetic fillers means many beauty fans are not happy with her latest announcement:

Not one to dwell on negative comments, Kylie has so far been ignoring the backlash as she recovers after an intense week of partying in honour of her 18th birthday.

 

A photo posted by King Kylie (@kyliejenner) on

Following a party in Los Angeles, a mini-break on a luxury resort in Mexico and a blow-out nightclub bash in Montreal which earned her a cool €175k fee, Kylie has well and truly honoured her milestone birthday.

However her new lipstick range is not the only thing that hasn't gone down well with fans, as Kylie's Montreal appearance largely failed to impress. Many fans criticised the teen for looking bored throughout the evening, while her choice of outfit – a Mugler two piece costing over €2,000 – wasn't a hit either.

"She's ONLY 18 BUT Looks 30 …. too MUCH surgery at such an early age," said one observer. Another commented: "She could at least look happy," while a third was even blunter: "She looks bad!!"

Seems like Kylie can't do anything right this week…