Nicola Roberts, the latest from Girls Aloud to try and push a serious solo career, has announced the release date of her new single, 'Lucky Day'. The track, which was co-produced by Canadian band Dragonette – will be released on 18 September, and to whet all of your appetites, she's released a teaser video with some of the track on it. Be prepared for some, erm, powerful vocals if you're still at work.