Unbreakable

Unbreakable is the sixth studio album by American group Backstreet Boys. It was released on October 24, 2007 in Japan, followed by a worldwide release. The album marked the group's first release as a quartet, following Kevin Richardson's departure in 2006 to pursue other interests.

The album received mixed reviews from critics, with praise for its polished harmonies, mature and radio-friendly pop sound, while others criticized it for a lack of standout songs and innovation. Unbreakable achieved strong international success, topping the charts in Japan and Taiwan, reaching the top ten across Europe, and debuting at number seven on the US Billboard 200, though its North American sales were lower and its chart run shorter than previous releases, with worldwide sales reaching 1.7 million copies.