Possible Clues:

• Mask star
• '70s variety show co-host
• Chaz's mom
• Starred in "Burlesque"
• One of the Witches of Eastwick
• She married Sonny in Archerstown
• Contralto superstar
• Contralto with a Grammy, an Emmy and an Academy Award
• US singer and actress
• One-named singer with a 1988 Best Actress Oscar