Fabulous Muscles is the third album by American experimental band Xiu Xiu, released on February 17, 2004 on 5 Rue Christine. The album marked a change in the band's sound, described as a depressive mix between experimental rock and synth-pop. It is considered to be more accessible than Xiu Xiu's previous two studio albums, A Promise and Knife Play. Fabulous Muscles has received mostly positive reviews from critics.