Related Clues:

• Sings softly
• Does the Bing thing
• Sings smoothly
• Sings like Michael Buble
• Sings a slow song
• Sings sentimentally
• Chris Isaak does it
• Performs soothing music
• Sings gently
• Sings a lullaby, say
• Sings like Tony Bennett
• Sings like Frank Sinatra