Possible Clues:

• Dear French singer
• Oscar winner for ''Moonstruck''
• "Burlesque" actress
• ''The Voice'' guest mentor
• One-named Oscar winner
• "Closer to the Truth" diva
• Sonny & --, a popular duo from 1964 to 1975
• Singer who won an Oscar for ''Moonstruck''
• Lead role in 'Clueless'
• Singer with Sonny once,