Well since I work on the "6ABC/Boscov's Thanksgiving Day Parade" in Philly I figure I might add a little input. I think its a little rude that Disney is giving the attention to NYC's parade and not ours considering we beat out the Macy's parade in Neilson ratings by a margin last year and considering we are a Disney parade (paid for in part and broadcast by ABC Television). However, it is always nice to work with the guys from WDW, they deff. make the parade a lot more fun (especially the truck load of Disney merch. they gave out last year to the on-camera aud.).
We also have a more Disney advantage to the Philly parade, the production is run by many of the guys who work with Lightship Entertainment to produce the Walt Disney World Christmas Parade.
As for the singing question, all of the singers in our parade are pre-recorded (we just dont tell the youth choir that because it looks more real with their lips moving). This leads me to believe she will be a CD track and a muted microphone.