If you were born on Sunday, May 09, 1943 then Mrs. Brown, You've Got A Lovely Daughter by Herman's Hermits was the number one on your 22nd birthday, and went to number one on April 25, 1965. Check the price of Mrs. Brown, You've Got A Lovely Daughter by Herman's Hermits on Amazon.com
The biggest selling book of 1965 (the year you turned 22) was The Source by James A. Michener.