O.A.R. (short for Of a Revolution) is an American rock band, founded in 1996 in Rockville, Maryland. The band consists of lead vocalist Marc Roberge, drummer Chris Culos, guitarist Richard On, bassist Benj Gershman and saxophonist Jerry DePizzo. Together, the band has released seven studio albums, including their latest release, King, in August 2011. The band is well known for their live shows and extensive summer touring, and have released five records of various live performances to date.

King was O.A.R.'s follow-up to their 2008 studio album All Sides, which debuted at No. 13 on the Billboard Top 200 and No. 3 on the Digital Album chart. The album provided many firsts for the band including their first Certified Platinum single "Shattered," which in 2009 was the No. 6 best-selling Rock Song at iTunes and earned them an ASCAP Award as one of the Most Performed Pop Songs of the Year. With All Sides, the band's cumulative album sales reached close to 2 million and they received the honor of being on Performing Songwriter's list of the 100 Most Influential Independent Artists of the Past 15 Years. The release was the culmination of years of hard work creating music, traveling the country and performing for their legions of fans.

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