Sia & Friends

Now known as an artist in her right, Sia has worked with a wide range of collaborators as a singer, songwriter or producer. On this list, soul star Adele, R&B queen Beyoncé, pop compatriot Kylie Minogue, rappers Eminem and Flo Rida, house producer David Guetta, downtempo duo Zero 7 and others deliver songs that don't necessarily feature Sia in the credits, but showcase her genre-busting scope.