If you were born on Sunday, May 09, 1943 then Joyride by Roxette was the number one on your 48th birthday, and went to number one on May 05, 1991. Check the price of Joyride by Roxette on Amazon.com
The biggest selling book of 1991 (the year you turned 48) was Scarlett: The Sequel to Margaret Mitchell's "Gone with the Wind" by Alexandra Ripley.