The 00s nostalgia just keeps coming, and we’re not just talking about everyone's sudden love of Ugg boots and low rise jeans again. Girls Aloud are officially back together and will be embarking on a UK tour later this year.Their national tour may not kick off until May this year, but the bandmates have already been spotted spending a lot more time together, most recently with a girls' night out in London.The four reunited look very chic, with Cheryl officially debuting her brand new dramatic fringe transformation for the outing.