Their final studio album, "Synchronicity" (1983), was No. 1 in the UK, Canada, Australia, Italy and the US, selling over 8 million copies in the US. Its lead single, "Every Breath You Take", became their fifth UK number one, and only US number one. During this time, the band were considered one of the leaders of the Second British Invasion of the US; in 1983 "Rolling Stone" labelled them "the first British New Wave act to break through in America on a grand scale, and possibly the biggest band in the world." The Police disbanded in 1986, but reunited in early 2007 for a one-off world tour that ended in August 2008. They were the world's highest-earning musicians in 2008, due to their reunion tour.