The Flaming Lips thing was for a New Years show, and it got such a good reaction they did it at a couple of festivals and got such a huge reaction and so many requests that they decided to record it, it was done quickly.
The Gorillaz have a few good singles, they are not an album band, although Bobby Womack is brilliant.
The National are brilliant.
It's all opinions, Black Keys can't really be compared to the National or Gorillaz. Very different styles.