Query: How many copies worldwide has Queen's 1995 album sold?
Context: Both stages of recording, before and after Mercury's death, were completed at the band's studio in Montreux, Switzerland. The album reached No. 1 on the UK charts immediately following its release, and has sold 20 million copies worldwide. On 25 November 1996, a statue of Mercury was unveiled in Montreux overlooking Lake Geneva, almost five years to the day since his death.