Don't get me wrong, I like a few songs on 21.
But... Safe & Sound >>>>>>>>>>>>> Skyfall
It's hard to not notice Skyfall because: it's Adele, you had to endure listening/watching the whole song when you watch the movie (my brother got me to watch it), you would know it's written by Adele because it said so at the end of the music video in the movie. If you fell asleep and didn't hear the full thing, you still have a chance to listen to it at the end credits.
If only Safe and Sound got the same treatment.

at the sales. So dead.