One of the autographs for sale in the store. I'm always suspicious of bogus Barbra autographs, even in the land of Disney. Not that they would knowingly sell phony signatures- there's just no way to be sure- unless you get the autograph in person!
At the Disney Movie Studio park in Orlando, there is a back lot tram ride. After you get off, you walk through a gift store/ museum. I believe the museum is sponsored by the AFI. One wall is full of the Life Achievement Award recipients. Of course I spotted Barbra's picture a mile away.