Congratulations to
dreddy_reddy and
violet_wench for both naming the correct movie - White Christmas.
Extra points to
violet_wench for correctly naming Rosemary Clooney and Vera Allen as the singers and Bing Crosby and Danny Kaye as the "performers"
No one correctly guess the "Marvelous" singer Bette Midler who sang Sisters on her "Bette Midler sings teh Rosemary Clooney Songbook" with LInda Rondstat.
Here is the Bing Crosby and Danny Kaye clip from youTube.com doing "Sisters".
YouTube - Sisters