Christmas Parade Taping 2007

Source
Here is the list with who will be where:

Regis Philbin (WDW)
Kelly Ripa (WDW)
Ryan Seacrest (DLR)
High School Musical Performance w/ HSM Stars (WDW)
Justin Bartha (Segment)
Miley Cyrus (DLR)
Billy Ray Cyrus (WDW)
Jonas Brothers (WDW)
Joey Fatone and Drew Lachey (WDW)
Michael Buble (DLR)
Jennifer Lopez and Marc Anthony (DLR)
Mana (DLR)
Carlos Santana (DLR)
Carrie Underwood (DLR)
Josh Groban (WDW)
Harlem Boys Choir (WDW)
Whitney Houston (WDW)