Brad Paisley's newest record, This is Country Music, plays like a country rock mix tape curated and orchestrated by Paisley himself. It's packed with guest appearances from the likes of coiffed guitar acrobat Marty Stuart, classic rock crooner Don Henley and, of course, Paisley's go-to duet partner these days, Carrie Underwood. Plus, Clint Eastwood whistles the melody to the instrumental 'Eastwood.' If that sounds like the most awesome thing ever, well, what can we say? Not that it's anything new for the 'Celebrity' singer - he's put together some great collaborations in his day. Check out our list of the five best Paisley duets of all time, and when you're done reading, head over to our Facebook page to enter for your chance to win a trip to West Palm Beach to see Paisley in concert - and meet him backstage.