If you know, in Bye Bye Birdie, why does Ann-Margret sing Bye Bye "Bird-Hee" instead of just Birdie?

we've asked all the king's horses and all the king's men who we know in the music industry and no one knows why

also interesting, the director George Sidney wanted to showcase Ann-Margret at the beginning of the movie but the studio wouldn't pay for any additional production. So Charles Strouse wrote this song just for her and the director paid for it out of his own pocket and it made Ann-Margret a star

Dick Van Dyke, who starred in this and the original Broadway show, told all his friends on The Dick Van Dyke show not to bother going to see the movie because it was just the Ann-Margret show.

If you know, in Bye Bye Birdie, why does Ann-Margret sing Bye Bye "Bird-Hee" instead of just Birdie?
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