Lady Gaga showed how much of a "monster" she can be during an interview on "Late Show with David Letterman" on Monday.
Gaga's playful outburst came after Letterman questioned the singer's credibility concerning an event where she claimed to have eaten the head of a Barbie doll.
"I'm just so fed up with all of this," said Gaga while shoving the torn note card into her mouth.
Click the video for more! "Late Show with David Letterman" airs weeknights on CBS.