If you were born on Tuesday, July 16, 1940 then Unbelievable by EMF was the number one on your 51st birthday, and went to number one on July 14, 1991. Check the price of Unbelievable by EMF on Amazon.com
The biggest selling book of 1991 (the year you turned 51) was Scarlett: The Sequel to Margaret Mitchell's "Gone with the Wind" by Alexandra Ripley.
She Ain't Worth It, Glenn Medeiros feat. Bobby Brown