"Perry's impressive numbers also include a record nine No. 1s on the Pop Songs chart, a record seven on the Adult Pop Songs chart, 10 on Dance/Club Play Songs and an overall seven atop the Hot 100. She's sold 48 million songs in the U.S. alone, according to SoundScan, with tracks such as "Firework" and "California Gurls" among the top 30 downloads ever."