Robert Plant and Alison Krauss are the best in Grammy Award 2009.

Collaboration album between Robert Plant and Alison Krauss "RAISING SAND" that was released in October 2007,make they to set a Grammy Award 2009 for four categories.For categories;"The Best Album 2008","Record of The Year" for hit single "Please Read The Letter",and for "Best Pop Collaboration With Vocal" for song "Rich Woman" and also for category "Best Country Collaboration With Vocals"