"E.T." is a song by American singer Katy Perry from her third studio album, Teenage Dream (2010). She co-wrote the song with its producers Dr. Luke, Max Martin, and Ammo.
"E.T." was serviced to radio stations as the album's fourth single on February 11, 2011. One version of the song features verses from American rapper Kanye West, with that version was included on the reissue of the album, Teenage Dream: The Complete Confection.
Musically, it is an electronic and hip hop ballad which draws heavily from dubstep and techno, along with smaller amounts of drum and bass. According to Perry, the song lyrically speaks of "falling in love with a foreigner".
The song became Perry's fifth non-consecutive number one on the U.S. Billboard Hot 100, and also topped the charts in Canada, New Zealand, and Poland.
To date, "E.T." has sold 6 million digital downloads in the U.S., and is certified eight-times platinum in the country. It was the fourth biggest song of 2011, according to Billboard.
To promote the song, Perry and West performed on the tenth season of American Idol, the 54th Annual Grammy Awards, and at Madison Square Garden for Z100's Jingle Ball. Floria Sigismondi directed the song's music video, which depicts Perry as an evolving alien drifting in outer space before landing on an abandoned litter-covered Earth, interspersed with clips of large felines hunting game. The video garnered positive reviews from music critics.
The single won Favorite Song at the 38th People's Choice Awards, and received three nominations at the 2012 Billboard Music Awards.