“What are you wearing, or what aren’t you wearing?” asked David Letterman.
“I’m Batman,” the 25 year-old replied. 'I only liked the jacket so I only wore the jacket,” said the singer, who acted cagey when asked about her love life.
“I do like a man in an orange tie,” she said, flirting with Letterman to avoid the subject. She also skirted around a list of rumours that Letterman read out to her. “You once spent $11,000 on underwear in one shop?” asked Letterman.
“That’s very inappropriate of you to ask,” she said.
Gaga later got bored of the questions, grabbed Letterman’s notes, tore off a chunk and chewed on it. She then pretended her mouthful had poisoned her before spitting out the pieces behind the sofa. “I’m just so fed up of all of this,” she joked with her mouth full of paper.