It may seem like young stars have it all, but spending your entire life in the spotlight is not an easy task. You have to constantly deal with people judging you and finding something wrong with every single thing you do, and stars like Kylie Jenner and Justin Bieber have heard it all. Jenner is just 18 years old, and as someone who is dating a much older rapper, already living on her own in a $2 million mansion, and already having to come clean about plastic surgery, there has been a ton of backlash to come with all of these things. Bieber, who is now 21, knows a thing or two about being judged, and he has sympathy for Jenner, who is a good friend of his.

He admitted in his recent candid interview with Billboard that being a child star "is the toughest thing in the world." "I wouldn't suggest being a child star," he said. "I want people to be more kind to young celebrities."

He then used Jenner as the perfect example. "Like Kylie. Look at her world: She has been living on TV since she was a kid. Every time she's looking around she sees a camera, and that's affecting how she's thinking and how she's perceiving people and why she has to do certain things," he continued to say. "Situations that happen taint your mind, especially in the industry. Especially for girls."

He then went on to explain how he really does "hurt for some people" in this business. "Everything is so [based] on people's looks and stuff," he added. "Look at the statistics on how many child stars have crumbled and turned out to be wack jobs. It's because-it's f-ked, bro, this lifestyle."

We've literally watched Jenner grow up ever since she was first featured on her family's hit reality show "Keeping Up With The Kardashians" at the age of 10. Bieber, on the other hand, was discovered when he was just 12 years old. Jenner recently launched her own website and since then, she's been opening up to her fans on what it's really been like growing up in the spotlight.

"People are expecting more out of me and that's overwhelming and nerve-racking," she said in September, according to People. "I feel like people are also expecting me to just go wild now, as if I've been holding back. But I'm still the same girl that I was the last month, when I was 17. I'm still growing up, learning and making mistakes, just like any other teenager would-yet millions of people are watching and judging me. That's the part I don't know if I'll ever get used to."