Kevin Liles, the former CEO of Def Jam Records, now heads up his own multi-industry firm, KWL Enterprises. This includes working as a consultant to stars such as Jay-Z and Mariah Carey, with whom he has just released a line of tea-blend soft drinks. Yesterday (18 June), he spoke to just-drinks about the celebrity tie-ups, how to make the most of new technology and Jay-Z and Carey's love for the beverage industry.