E.T music video by Katy Perry

American recording artist Katy Perry has song ,E.T with Kanye West from her third studio album Teenage Dream (2010). Written by Perry, Dr. Luke, Max Martin, and Ammo, and produced by the last three, The song 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, who also appears in its Floria Sigismondi-directed music video, which was released on March 31, 2011.

Over a "stomp-stomp-clap" beat similar to Queen's "We Will Rock You" (1977), "E.T." is an electronic ballad that tells of "falling in love with a foreigner". Extraterrestrial metaphors are used throughout, and West continues these metaphors in his two verses, making heavy use of Auto-Tune at times. Though the song was widely noted for its darker and more mature theme, in contrast to Perry's conventional works, critics were overall mixed in response. West's presence on the single also received divided opinions. The single topped the Billboard Hot 100—the fourth from Teenage Dream to do so—and is Perry's fifth number one on the chart. It has peaked elsewhere at number one in New Zealand, number five in both Australia and Canada, as well as within the top forty in Austria, Ireland, the Netherlands, and the United Kingdom.