G.T.A. Opening Day Edition

It's opening day ladies and gentlemen. How about a nice Guess That Ass to honor this momentous occasion?

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Guesses?

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And the answer is -

1980's ballgirl for the Cubs Marla Collins

p.s. - Did you know Mrs. Fields, as in THE Mrs. Fields, was a ballgirl for the Oakland A's before she decided to launch a cookie empire?