Father worshiped a tennis star, to a palindromist, 15 letters
Britney Spears, for one, 7 letters
Diana Ross, for one, 7 letters
Madonna or Britney Spears, 7 letters
Madonna, e.g., 7 letters
Whitney Houston, for one, 7 letters
Hall & Oates, e.g., 6 letters
The Carpenters, e.g., 6 letters