That month, she turned the primary artist to have 4 songs sell over 5 million digital items when "E.T." reached that mark along with "Firework", "California Gurls", and "Hot N Cold".
In October, "Firework" was released because the album's third single. The Matrix's self-titled debut album, which Perry had recorded with the band in 2004, was launched onto iTunes on January 27, 2009, because of her solo success. On July 22, 2009, Perry recorded a reside album titled MTV Unplugged, which featured acoustic performances of 5 tracks from One of many Boys as well as one new music, "Brick by Brick", and a cowl of Fountains of Wayne's "Hackensack".

Only five experienced actors worked on the movie; a lot of the solid was found throughout preproduction in Tennessee. It topped the Billboard Hot a hundred for five non-consecutive weeks, making Teenage Dream the ninth album in history to produce four number one singles on the chart.