90210-No! Gabrielle Carteris Turns 50

1/2/2011 11:50 AM PST BY TMZ STAFF
Gabrielle Carteris -- who was 29 when she began playing 16-year-old Andrea Zuckerman on "Beverly Hills, 90210" -- is celebrating her 50th birthday today.

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And now the answer to the eternal question, why do they call her Ahnnnnndrea?