Groove Armada offer their celebrity playlist on iTunes Music Store this morning, as Apple presents a single of the week from Leaves.

The Leaves single is called Shakma, and is available now for free download. Accompanying Apple notes state: "We like Coldplay. We also dig Radiohead. And somewhere near the intersection of these two bands and another fave, Nick Drake, stands Leaves." The Icelandic band are described as "moody, swirling folk/electro rock".

The service is also offering U2's Vertigo album (on a per-song basis); and exclusive tracks from Busted, The Kings of Leon and The Prodigy, among others.