She should be featured in a new remix of S & M, that would slay! Jk, but songs like What Now would be so good if they were by Celine as well, so I'm here for their duet. Celine & Xtina >>>, two of the greatest female voices ever. Adele and Celine would slay too and the GP would totally be here for that. I've always wondered what Celine thought about Kelly Clarkson, since she covered "I surrender" and "Think Twice" on Idol. Does anyone know if she has ever acknowledged her? Their voice would fit so well together and it'd be such an emotional song!