Katy Perry, is an American songwriter and singer who has exploded into the scene with some amazing songs. Born Katheryn Elizabeth Hudson, Perry has been nominated nine times for the Grammy Awards. She is widely regarded as the world’s top female pop vocalist currently and has an assortment of chartbusters to her name. Named Billboard Woman of the Year in 2012, the pop diva has sold over 11 million albums and 75 million digital songs worldwide. If you’re wondering what her best songs are, here is a list of top 10 most popular songs of Katy Perry.