Other mistake: Julian McMahon's real Australian accent slips through when his assistant asks him if he should rest and McMahon says, "Later. First I have some unfinished business to attend to."
Other mistake: Johnny picks up Sue's clothes and hides them in his jacket after she strips on the bridge, but when the shot changes to the stunned crowd, we can see Reed and Johnny running off to the left. From the way Johnny's arms are moving, you can tell he is no longer holding the clothes.
Answer: That song is "New World Symphony" by Miri Ben-Ari.