Kylie Jenner ''takes 200 selfies a day.''

The 18-year-old reality TV star, who confessed to getting her lips enhanced earlier this year, reportedly ''can't walk past a reflective surface'' without admiring herself and thinks she is much more attractive than her 19-year-old model sister, Kendall Jenner.

A source said: ''She's decided that she's the best looking person in her family - even prettier than Kendall. Her vanity is out of control. She takes 200 selfies a day and can't walk past a reflective surface without checking herself out.''

But the 'Keeping Up With the Kardashians' star's childhood friends are said to be growing tired of her self-obsessed ways.

The insider said: ''She's been slowly separating herself from the kids she grew up with. They used to all themselves 'the squad' and basically lived at each other's houses. But she's pushed almost all of them to the side.''

Despite having millions of fans on social media, Kylie struggles to talk to people in person.

The source added to America's OK! magazine: ''[She] struggles with communicating naturally with people in real life. She tries, but she's just not the brightest candle on the cake. How she got her high school diploma is a mystery to anyone who knows her.''