The band's double compilation, "Hot Rocks 1964–1971", was released in 1971; it reached No. 3 in the UK and No. 4 in the US. It is certified Diamond in the US having sold over 6 million copies, being certified 12x Platinum for being a double album, and spent over 347 weeks on the Billboard album chart. In 1974 Bill Wyman was the first band member to release solo material, his album "Monkey Grip". As of 2018 Wyman has released five solo albums, with the most recent, "Back to Basics", released in 2015.