Medley of broadway/musical pieces for piano?

I would really like to play some pieces from various musicals but I can't decide which one exactly, so I decided that a medley would be the way to go. Does anyone know where I can find free piano solo sheet music for pieces from musicals or possibly even a medley that's already been arranged (hopefully including musicals like "Into the Woods", "Phantom of the Opera", "Wicked", "West Side Story" or "Sweeney Todd")?