Possible Clues:

• Pop rocker Gwen
• Gwen of No Doubt
• Singer Gwen
• No Doubt singer Gwen
• 'Hollaback Girl' singer Gwen
• Gwen who sang 'Don't Speak,' 1996
• Lady Gaga's real first name
• Gwen of 'The Voice'
• Harlow in ''The Aviator''
• What You Waiting For? was a debut solo single for Gwen ____ in 2004