Slade are an English glam rock band from Wolverhampton. They rose to prominence during the early 1970s with 17 consecutive top 20 hits and six number ones on the UK Singles Chart. The British Hit Singles & Albums names them as the most successful British group of the 1970s based on sales of singles. They were the first act to have three singles enter the charts at number one; all six of the band's chart-toppers were penned by Noddy Holder and Jim Lea. As of 2006, total UK sales stand at 6,520,171, and their best-selling single, "Merry Xmas Everybody", has sold in excess of one million copies. Following an unsuccessful move to the United States in 1975, Slade's popularity waned but was unexpectedly revived in 1980 when they were last-minute replacements for Ozzy Osbourne at the Reading Rock Festival. The band later acknowledged this to have been one of the highlights of their career. The original line-up split in 1992, but the band re-formed later in the year as Slade II. The band have continued, with a number of line-up changes, to the present day. They have shortened the group name back to Slade.