NEW YORK (Reuters) - British rock band Coldplay announced on Friday they will release their fifth studio album on October 25 in the United States and a day earlier elsewhere. The group unveiled the new albums graffiti pop art reversible cover and its title Mylo Xyloto, on its website, but did not explain what the album title meant. The albums new single, September, will be released on September 12, following the June release of Every Teardrop is a Waterfall.