The Island Def Jam Music Group was an American record label group formed in 1999 when the Universal Music Group merged two of its daughter companies Island Records and Def Jam Recordings. In 2011, Motown Records was split from the Universal Motown Republic Group and was subsequently merged into the Island Def Jam Music Group. Barry Weiss served as Chairman and CEO of the company. As of February 2014, artists on the IDJMG roster included Mariah Carey, Rihanna, Kanye West, 2 Chainz, and Iggy Azalea. On April 1, 2014, following the resignation of CEO Barry Weiss, it was announced that Island Def Jam will divide into three separate entities: Def Jam Recordings, Island Records and Motown Records.HistoryThe IDJMG was formed in 1999 when UMG merged two of its daughter companies, Island Records and Def Jam Recordings, as a result of the merger between Universal Music and PolyGram. Also incorporated into the deal was the staff, roster, and back catalog of Mercury Records, which was dismantled for several years until it was revived as a new venture in 2007. Meanwhile, the labels Island Records and Def Jam Recordings continued and still continue to operate as their own respective labels as a part of the Island Def Jam Music Group umbrella (Island has concentrated on pop and rock performers, while Def Jam has most of the group's hip hop and R&B acts). The company also operated the Lost Highway Records label and distributed New York, US label Photo Finish Records.