disneyprincess11 wrote:From
https://d23.com/the-walt-disney-studios ... expo-2013/
Fans can expect appearances from Kristen Bell and Idina Menzel (Frozen), Dane Cook (Disney’s Planes), Jason Schwartzman and B.J. Novak (Saving Mr. Banks), Ty Burrell (Muppets Most Wanted) and top Marvel and Disney•Pixar talent. And in typical D23 Expo fashion, fans can also anticipate surprise appearances from more of their favorite stars.
So, the musical performance must be their duet.
Hoping someone records it. 
And I don't see a screening of Frozen, so we can rule that out.
I was hoping that too but...nothing allowed

People are checked before getting in. Hopefully one of "The Rotoscopers" will go and I hope we would have Chelsea singing this like she did with "Let It Go".
However, I don't really think it'll take too long for the soundtrack to be leaked
or actually released (Although they usually realease it the same month the movie comes out o kind of closer so forget that) They are really working hard on it so I
think hope by the end of August/likely by the beginning of September with the release of the American Trailer they'll show somenthing (at least ten seconds! I'm ok with just that!).
Besides, by the end of August I'll be on a trip and information (pictures, videos, good suff) about The Sims 4 will be being released the same day I start this trip, so I won't be able to see anything. I'm not really lucky, but I hope that happens with Frozen too
Meh, just my hopes, dying for that music