Coachella 2011 now officially has its first mash-up. Our own Wendy Gilmartin just saw Sir Paul McCartney spinning with Afrojack. Usher was up there too.

We'd just been joking about guest appearances, so we actually thought it was a prank at first. But no, let it be known. Paul McCartney is in the building, and he's spinning records.

Anyone get a good pic? Let us know!

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