LAS VEGAS, NV - MAY 22: Khloe Kardashian arrives at 1 OAK Nightclub Las Vegas at the Mirage Hotel & Casino on May 22, 2015 in Las Vegas, Nevada. (Photo by Denise Truscello/WireImage)
LAS VEGAS, NV - MAY 22: Khloe Kardashian arrives at 1 OAK Nightclub Las Vegas at the Mirage Hotel & Casino on May 22, 2015 in Las Vegas, Nevada. (Photo by Denise Truscello/WireImage)