Possible Clues:

• Second stage name of Stefani Germanotta
• 'Bad Romance' Lady
• Lady in a senile and repetitive state
• To go and lose it sounds like nonsense
• Overly infatuated
• Fatuous joke by adult
• Fatuous joke suitable for adults once
• Slightly crazy joke, beginning of act
• Slightly mad (colloq.)
• Like one smitten