"
Hot n Cold" is a song by American singer
Katy Perry. The song was written by Perry,
Dr. Luke and
Max Martin and produced by Dr. Luke and
Benny Blanco for her second studio album,
One of the Boys (2008). The track was released as the album's second single on September 9, 2008. The lyrics address an unstable romantic relationship caused by a partner's
mood swings.