Jade performing on Jools Holland's Annual Hootenanny last monthJade Thirlwall is treating fans to another taste of her long-awaited debut solo album with the release of new song IT Girl.Like her first single Angel Of My Dreams, the former Little Mix singer relays her own experiences of the music industry on the new track, as well as “the often ruthless and complex nature of fame”, according to a press release.And in keeping with that, fans think they’ve spotted another dig at the X Factor winner’s former label chief Simon Cowell on the track.“Sign on the line fo