The original founding members of the most successful female UK act of the 21st century, Sugababes, are finally reunited 12 years later as Mutya Keisha Siobhan. The first ladies of British pop have been working on new material for their sophomore long anticipated album since last year, when they first announced their decision to reunite. A first sample of their new work is the uber-summery single “Flatline” which is co-written and produced by the master of contemporary pop Dev Hynes (Solange, Sky Ferreira) and is set to be released September 15th via Polydor Records. Until then, you can enjoy a sun-kissed music video directed by fashion photographer KT Auleta.