Mariah Carey [1] 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 mom [2], who is planning her wedding to fiancé James Packer [3] and gearing up for the premiere of her E! docuseries, Mariah's World [4]. Most recently, Mariah turned on the charm for John Legend [5] and his wife, Chrissy Teigen, when she serenaded the "All of Me" singer during a recent concert [6].