Mariah Carey didn't hold back while debuting her DJ set at 1 OAK Nightclub in Las Vegas on Saturday night. The singer, who currently has a residency at Caesars Palace, rocked a lace bustier, leather jacket, and thigh-high fishnet stockings and struck a number of sexy poses for photographers before heading inside to the DJ booth. It's already shaping up to be a big year for the iconic singer and glamorous mum, who is planning her wedding to fiancé James Packer and gearing up for the premiere of her E! docuseries, Mariah's World. Most recently, Mariah turned on the charm for John Legend and his wife, Chrissy Teigen, when she serenaded the "All of Me" singer during a recent concert.