Possible Clues:

• In foyer, a chair — American diva's reclining, is she?
• Chanteuse with chart-topping hits found at the tops of 4-, 14-, 16- and 19-Down
• The Songbird Supreme
• *Christmas singer who sometimes does a hair flip in her music videos?
• Record holder for the most No. 1s by a solo artist
• “All I Want for Christmas Is You” singer
• "Vision of Love" diva
• Top-selling vocalist of the 1990s
• 'Precious' actress
• Top-selling vocalist of the 1990's