Possible Clues:

• “Believe” singer
• "Dancing Queen" singer, 2018
• 'A Song for the Lonely' singer
• "The Goddess of Pop"
• 'Suspect' star, 1987
• "Goddess of Pop"
• Singing star since the '60s
• Oscar winner for 'Moonstruck'
• Sonny's '60s partner
• 1987 Best Actress Oscar winner