Beautiful.
The Raconteur's bluegrass version of "Old Enough," with Ricky Skaggs (country music old-timer) and Ashley Moore Monroe (oops!) (who I've never heard of, but has a very sweet voice). Some parts are a little bit rough -- my main complaint is that they *really* should have turned up Ricky Skaggs's mic because you can't hear his melody line over Jack White singing harmony -- but there is an amazing harmony bit in the middle that makes it all worthwhile.