They might get better grades, have more friends, a better boyfriend, a better job - whatever it is, something always seems to creep up and bum us out a little bit. Sure, we're happy for them, but you know...
In Kylie Jenner's case, she's already had to live with Kim Kardashian stealing the spotlight in their famous family and now she's got a front row seat to sister Kendall Jenner's rise to fame, which might actually surpass Kim's - if it hasn't already.
The 17-year-old has dabbled in a few different business pursuits, but hasn't fully committed to a career path yet (although we hear she's considering becoming a singer). Meanwhile, Kendall is modeling for all of these major magazines, walking the runway for some of the hottest designers AND being called fashion's next "it" girl.
So, is it starting to weigh on her? "Living in the shadows of her sister Kendall's incredibly successful modeling career is really hard on Kylie," a source told RadarOnline. "Everyone in the family gives all of the attention to Kendall. She feels like the other Jenner."
We can understand how it might be a little hard, but seriously, Kylie can pretty much do anything she wants (and that includes modeling!)
She's gorgeous, she's funny, she's smart, she's got an incredible eye for style...we REALLY don't think she'll have a problem making a name for herself once she decides which path she wants to pursue.