LAS VEGAS, NV - SEPTEMBER 21: Kourtney Kardashian (L) and Kylie Jenner arrive at the iHeartRadio Music Festival - press room - Day 2 held on September 21, 2013 in Las Vegas, Nevada. (Photo by Michael Tran/FilmMagic)
LAS VEGAS, NV - SEPTEMBER 21: Kourtney Kardashian (L) and Kylie Jenner arrive at the iHeartRadio Music Festival - press room - Day 2 held on September 21, 2013 in Las Vegas, Nevada. (Photo by Michael Tran/FilmMagic)