Question: Who sings beautiful girl in singin in the rain?
Disambiguated questions and answers: question: Who sings beautiful girl in the 1952 stage musical singin in the rain on broadway?
Who sings beautiful girl in the musical singin in the rain for the Chichester/London 2012 Revival?
Who sings beautiful girl in the 1952 film singin in the rain?
answer: Don Lockwood and Fans
Female Chorus (including Kathy Selden)
Jimmy Thompson
Natural Questions answer: Jimmy Thompson (from the Wikipedia article "Singin' in the Rain")