Possible Clues:

• Stuck-up star
• 'Me, me, me' sort
• One in 1 keen to make a comeback?
• Renee Fleming, for one
• She usually has a big 55-Across
• Prima donna, woman opera singer
• Lincoln Center performer
• Maria Callas, e.g.
• Celine, Mariah or Aretha, e.g
• Distinguished female singer