She's come a long way since American Idol, and I remember when I first heard this song, I was blown away.
I won't go into much detail about her or the song, your heads must be spinning after reading the Cook review.
It's an amazing song, an R&B mid-tempo with lots and lots of groove. It's something that's really easy to tap you foot and 'bang' your head to, something that only a few artists have managed to do.
The melody is amazing, it's flow-y and gorgeous.