Did you know that Katy Perry is the only act in US history to have 5 songs sell over 4 million downloads each?

The singer’s ‘E.T.’, ‘I Kissed A Girl’ and ‘Firework’ have all passed the 4 million mark whereas ‘California Gurls’ and ‘Hot N Cold’ – her top-seller with 5.01 million downloads – have both sold north of 5 million. However, Perry is on track to claim her 6th 4 million-seller as ‘Teenage Dream’ recently accumulated 3.92 million downloads.

Now you know!