Answer
Jason Mraz collaborated with Colbie Caillat for the Grammy-winning song "Lucky". The song was released in 2008 and was a huge success, reaching number one on the Billboard Hot 100 chart. The song was written by Mraz and Caillat, and it was produced by Mraz and Steve Lillywhite. The song is about two people who are in love and are trying to find their way in the world.