Disney theme parks will often repurpose music and themes among properties on opposite coasts. For example, as I've already written, in 1985 Disneyland's 30th Anniversary Parade soundtrack was tweaked to be used by Walt Disney World's Magic Kingdom as the tune for Mickey's Street Parade.
Recently, we've seen this type of repurposing in soundtrack once again with Disney's promotion for Summer Nightastic. This seasonal event started in Summer 2009 as an all-encompassing theme of pre-exisiting shows bundled under the same brand name ("Nightastic") to help Disneyland push their summer activities, as they didn't have any new rides or attractions to promote.
