If আপনি were to have a duet with with your পছন্দ singer, which song would the two of আপনি sing?

I'd প্রণয় to do a duet with Idina Menzel! She's my পছন্দ Broadway actress and singer, and one of the most inspirational women I've ever seen.
I'm a massive অনুরাগী of symphonic metal bands like Within Temptation, and I think her powerful voice would fit perfectly. I chose the song from above because it's already a duet.