Crossword puzzle clue "let's get lost singer baker"

"Let's Get Lost" singer Baker

Baker who was an activist, an actress, a dancer, a singer, and a spy, but not, as far as I know, a baker

Lyricist Cahn who wrote "Let It Snow! Let It Snow! Let It Snow!"

"Let It Snow, Let It Snow, Let It Snow" composer

Line from ''Let It Snow! Let It Snow! Let It Snow!''

Baker's baker

Command like "Let me be direct: Get lost!"?

"Let's get ___!" (Let's go!)