I head to a holiday party with a friend. A Justin Bieber song is playing and everyone is jumping around in Christmas elf outfits. I start bopping and singing along. My friend says,
"This sounds like a fourteen-year old is singing it."
"Yeah."
He looks at me again,
"Wait, you know this song. Why do you know this song?"
"I have a little sister?"
"Don't blame this on her. You know this song all on your own."
Source:
http://www.goodtimeswithjess.com/2012/12/justin-bieber-has-christmas-album-out.html