According to Billboard.com:
Katy Perry becomes the first female artist in 11 years to take three straight radio singles from an album to No. 1 on the Billboard Hot 100, as "Firework" lifts 2-1. She first topped the chart in June for six weeks with "California Gurls," featuring Snoop Dogg. That was followed by a two-week stay at the top in September with "Teenage Dream," the title track from her former No. 1 Billboard 200 set, which was recently bestowed a Grammy nomination for album of the year.