Petter Bjørklund Kristiansen (born 14 May 1989 in Fredrikstad) better known by his stage name Katastrofe, is a Norwegian singer and songwriter.

“About” Kristiansen started his musical career in 2008 with a joint song "Vi prekas" with Isabella Leroy.

In 2015, he cooperated with Marcus & Martinus, a twin brother duo winner of Melodi Grand Prix Junior.

Another notable success was with "Typisk Norsk" in cooperation with Norwegian violinist and Eurovision Song Contest 2009 winner Alexander Rybak.

The song, performed by Staysman & Lazz, finished in third place on the national Melodi Grand Prix 2015 finals in Norway, failing to qualify.