44. "Back to December" (2010)
One of the rare ballads where she goes crawling back to an ex she treated like dirt – and she's surprisingly effective in the role. Although breaking into the guy's house is a little extreme. (If she's blocked by the chain on his door, that means she already picked the lock, right?) And sorry, but you're seriously dreaming if you think I'm bothering to Google the name of that Twilight guy, don't @ me.
Best line: "It turns out freedom ain't nothing but missing you."