Possible Clues:

• She had a 2001 hit with 'Thank You'
• African Queen performed complete circle
• The queen of Carthage accomplished nothing
• Inactive Queen of Carthage?
• "Life for Rent" pop singer
• Character in Purcell opera was inactive
• Former queen of Carthage
• Welshman with money, say, for queen
• Lover of Aeneas accomplished nothing
• In Roman mythology, she committed suicide when abandoned by Aeneas