Pink and Sia are two artists with incredible voices and stage presence [1], and their new collaboration "Waterfall" is the duet we didn't know we needed in our lives. It's an up-tempo jam that also serves as the debut credited single for Norwegian production duo Stargate, who have crafted multiple hits for Rihanna [2] including "What's My Name," "Don't Stop the Music," and "S&M." While Sia has written numerous songs for other artists [3], this is the first time she's worked with Pink [4] in an official capacity — and we hope there's more to come.