Simplify the following text for a Grade 6 native English-speaking person.
Original: Buddy Clark ( July 26 , 1911 - October 1 , 1949 ) was a popular American singer in the 1930s and 1940s .
Simplified: Buddy Clark ( July 26 , 1912 - October 1 , 1949 ) was a pop singer popular in the 1930s and 1940s .