Possible Clues:

• River meeting the Loire near Tours
• Noted user of Auto-Tune
• She did a "Do You Believe?" tour
• 'Mask' star, 1985
• Bono's wife, once
• Sonny and - -
• Oscar/Emmy/Grammy winner
• The #1 greatest thing about being gay, according to Bravo
• 1970's variety show co-host
• Mask star