Vegas Resident Mariah Carey Celebrates A Night Out At 1 OAK Inside Mirage Hotel & Casino [Getty Images]

LAS VEGAS, NV - JULY 25: Mariah Carey attends 1 OAK Nightclub at Mirage Hotel & Casino on July 25, 2015 in Las Vegas, Nevada. (Photo by Denise Truscello/WireImage)

WireImage Denise Truscello