What's it called?

My mom had given me a new cd the other day when she came up to our house. It was the new Mormon Tabernacle Choir cd and McKenzie got so excited. She thought it was a Christmas cd and this is what she said, "Mom, let's put this in. I know what one it is. It's the knuckle cracker! I just love the knuckle cracker! It's a good cd!" I then informed her (between laughs) it wasn't a Christmas cd and it's not called the knuckle cracker. It's Nutcracker!" Kenzie then just replies, "Oh, right! I knew that!"