Kylie Jenner looked pretty in pink as she celebrated her 21st birthday this week! Her big sister Kim Kardashian also looked hot in her hot pink dress, and in my opinion, I think she was even trying to upstage the birthday girl. Maybe that's why Kylie had to slip into a second look. Check out her two looks here and see what the rest of the Kardashian/Jenner sisters wore to the party!

Kim in custom Yeezy