In 2001, Sadier sang on "Sol y sombra" on Fugu's "Fugu 1" LP on Minty Fresh Records. In 2002, Sadier sang the chorus on "New Wave" from Common's album "Electric Circus". She sang lead vocals on "Haiku One" from Sigmatropic's 2004 album "Sixteen Haiku & Other Stories" which was an album based on the poetry of Greek poet Giorgos Seferis. In 2007, Sadier wrote songs with Mouse on Mars and toured with them in Italy. They have yet to record the songs for release. In 2009 the French label Deux Mille released an EP which features Sadier singing with Toulouse-based band Momotte.