You've seen buses, trailers and motor homes before but wait til you see what these celebrities have done to their rides, from a day on the road with country music superstar Amy Grant who shows us how she unwinds during a busy tour schedule...to hollywood action star Vin Diesel's lavish mobile estate that transforms before your eyes. Then nascar racing champion Casey Mears gives us a peek inside the private space where he relaxes after an intense race. We're getting unprecedented access inside these Celebrity Motorhomes!