O.A.R. (Of a Revolution) is an alternative rock group based out of Rockville, Maryland. The band rose to fame the old fashioned way, touring extensively across the United States, garnering widespread exposure. Their hard work paid off, as they landed a major record deal and have been relevant in the mainstream music circuit ever since. O.A.R. has put out a number of records to high critical acclaim, and continues to play sold out concerts all across the United States.