Perry has her first million-selling single in the UK, with 2010 number three hit Firework. The UK's 146th million seller, it sold 937 copies last week to take its cumulative 192 week tally to 1,000,900.
It is very unlikely to be Perry's last: Roar - the first single from Prism sold 2,914 copies as it moved 66-69 this week, raising its 35 week tally to 946,840.
MusicWeek
Finally