Who was the featured singer in Katy Perry's song "E.T."?
Katy Perry discography:  She currently holds the record for most 5-million-selling singles in the United States, with six of her singles selling over 5 million (in order of release date: "Hot n Cold", "California Gurls", "Firework", "E.T.", "Roar", and "Dark Horse"). E.T. (song):  One version of the song features verses from American rapper Kanye West.
Kanye West