I first heard this song on the radio about a week and a half ago and almost drove off the road - alternately tapping out the beat on the steering wheel and laughing. The backstory is here on Wikipedia - I also guess from the dates on the wiki entry that this is a whole lot of no news for any readers on the other side of the Atlantic. Three things I love about this - the beat (yeah, I know, simple), the growl in her voice, and the tubular bells/chimes. Amy Winehouse sings Rehab:

Update - live version substituted - BIG hair & BIG voice!
Another update - added the music video version back - I missed the chimes and electrons are cheap (it’s YouTube’s bandwidth).