“E.T.” is a song by American pop music recording artist Katheryn Elizabeth Hudson better known by her stage name, Katy Perry. This single is from her second mainstream studio album Teenage Dream which was released last August 21, 2010. Perry confirmed that “E.T.” will be the fourth official single, to be released in February 2011. It was written by Katy Perry, Dr. Luke, Max Martin, and Ammo, and it was produced by the latter three. It hits the charts of ARIA in Australia, Canada Hot 100, RIANZ in New Zealand and US Billboard Hot 100 chart.