Because of the success of the cover versions, the official release of Katy Perry's version was brought forward from September 1 to July 30, 2008. On August 3, 2008, the song, which had entered the UK Singles Chart at number 139 the week before, climbed 135 places to reach position number 4. The song has become one of the most requested on Radio 1's request hour. The following week it climbed 3 places to reach number 1. The following week it stayed at the top spot for a second consecutive week and then went on to spend 5 consecutive weeks at #1.