Justin Bieber party moments: Kim Kardashian awkwardly runs into her little sisters. Kim Kardashian went out to Justin Bieber‘s birthday celebration in Los Angeles March 2 and ran into her little sisters, Kendall and Kylie Jenner! Apparently this was extremely shocking to the reality starlet.

The 31-year-old reality star tweeted about the awkward incident, tweeting, “The awkward moment when you go to a party and run into your little sisters! LOL.” Yes, it is a bit awkward when you attend an 18-year-old’s party and you’re 30. I guess the family isn’t as tight-knitted as they seem, you’d think she’d know that her sisters would be at the same party she was going to.

Kendall, 16, and Kylie, 14, are half as old as Kim, so it makes sense for them to be perusing the crowd for boys their own age. Not sure what Kim was doing spending time there instead of stopping by to wish him a happy birthday. I wonder why she called it an awkward moment, and if she greeted them as if they were old friends and not family? Justin’s party was said to be a star-studded event, with Selena Gomez, Ashley Tisdale and Carly Rae Jepsen in attendance.