Circus (Britney Spears album) "Circus" marked the longest time she had spent recording an album, adding, "I think it is more urban [...] I'm writing every day, right here at the piano in this living room" and also described the album as her best work to date. Producer Claude Kelly discussed the album's initial lack of concept saying, "When I went in with [Dr. Luke] we knew we were going to maybe write something for [Britney], but there was no concept, it was just knowing her style and knowing what she does. Max Martin, who produced Spears' debut single "...Baby One More Time", produced
Passenger (Britney Spears song) Passenger (Britney Spears song) "Passenger" is a song recorded by American singer Britney Spears for the eighth studio album "Britney Jean". It was written by Spears, Sia Furler, Katy Perry, Andrew Swanson and Diplo, being produced by the latter, while the vocal production was done by Anthony Preston, who produced most of the album. The song has received critical acclaim from music critics. After serving as a judge on the second season of the American version of "The X Factor", Spears began work on her eighth studio album in December 2012. In April 2013, Diplo, who already had worked with