I haven't seen it yet, either, but I wanted to. If it's still in theaters, I probably will, if I have time.

And "Let It Go" won best song at the 2014 Oscars/Academy Awards, and Idina Menzel performed the song at the show too. Demi Lovato also recorded a single version of the song too.

And check this out:

[MASHUP] Let It Go - Idina Menzel ft. Demi Lovato - YouTube

This is what Idina Menzel and Demi Lovato sound like together; someone created this fan-made mashup that makes it sound like they are singing in a duet. I think it's pretty cool.