High Quality Content by WIKIPEDIA articles! "E.T." is a song by American recording artist Katy Perry from her third studio album Teenage Dream (2010). Written and produced by Dr. Luke, Max Martin, and Ammo, with Katy Perry also credited for songwriting, it was released as the album`s third promotional single on August 17, 2010. The song was later announced as the album`s fourth single and released on February 16, 2011. The single version features vocals by American rapper Kanye West.