S.O.A.P. was a Danish pop music duo made up of sisters Heidi and Saseline Sørensen. Their music was primarily written and produced by Holger Lagerfeldt and Remee Zhivago for Sony Music Entertainment Denmark. They are best known for their single "This Is How We Party."   They were selected by the Australian duo Savage Garden to serve as the opening act on their 2000 European tour. S.O.A.P. also toured with the Backstreet Boys in the U.S.