Quote:
Originally posted by Space
besides "Titanium" and singing the hook on "Wild Ones" (which is ****ing brilliant), Sia has mostly been writing for other artists lately...so if I had to guess, I'd say her and Ke$ha are writing a track together 
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This is exactly what I thought. I think they are just writing together. Collaborations in pop music are typically between a rapper on the verses with the female vocalist on the chorus, which ultimately makes the song memorable. I don't know how they could make a successful arrangement for two females on the track, especially when they both sing. It's been done before obviously, but it doesn't happen often.