Question: Who was the vocalist for the song Shattered?

Context paragraphs:
O.A.R.: O.A.R. (short for Of a Revolution) is an American reggae, jam band founded in 1996 in Rockville, Maryland.  The band consists of lead vocalist/guitarist Marc Roberge, drummer Chris Culos, guitarist Richard On, bassist Benj Gershman and saxophonist/guitarist Jerry DePizzo.  Together, the band has released eight studio albums, including their latest release, The Rockville LP, in June 2014.  The band is well known for their live shows and extensive summer touring, and have released five records of various live performances to date.  Four of the band members grew up in Rockville, Maryland and attended Thomas Sprigg Wootton High School.  After graduating, they went on to study at The Ohio State University where they met the fifth member, saxophonist/guitarist Jerry DePizzo from Youngstown, Ohio.

Insomniac's Dream: Insomniac's Dream is an first EP by American nu metal band Adema, and was released on November 5, 2002 after debut self-titled album.  Only the first three tracks are new (not remixes), though "Shattered" was released on some international versions of "Adema" and "Nutshell" is a remake of an Alice in Chains song which was well received by their fans.  "Immortal" was the theme song for "", and is the only song to have had a music video.

Driving to Damascus: Driving to Damascus is the eighth studio album by Scottish rock band Big Country.  It was released in 1999 as both a standard edition and a limited edition digipack, and with bonus tracks in 2002.  In the U.S. it was released under a different name, "John Wayne's Dream".  The limited edition version featured different cover artwork, and included two tracks by Stuart Adamson's alt-country side project, The Raphaels ("Shattered Cross" and "Too Many Ghosts", subsequently released on the 2001 album "Supernatural"), although there was no indication in the credits that these were not by Big Country.  "Driving to Damascus" marks the band's last studio album to feature vocalist Stuart Adamson (who would die in 2001) and bassist Tony Butler (who retired from the band in 2012), and the last studio album until "The Journey" was released in 2013 with The Alarm vocalist Mike Peters taking over for Adamson and Simple Minds bassists Derek Forbes replacing Butler.

Shattered (Turn the Car Around): "Shattered (Turn the Car Around)" is the second single and second track from rock band O.A.R.'s sixth studio album "All Sides" (2008).

Johnny Hates Jazz: Johnny Hates Jazz is a British band, currently consisting of Clark Datchler (songwriter, vocalist, keyboards) and Mike Nocito (guitarist, bassist, producer, engineer).  In April 1987, they had international success with their first hit single "Shattered Dreams".

Doug Caine: Douglas Caine (born October 26, 1964 in San Francisco, California) is an American addiction treatment professional, founder of Sober Champion and, formerly, a professional bassist and vocalist.  He began fronting San Francisco Bay Area punk bands in 1980 and performed on the bass professionally for some years in Los Angeles and San Francisco, until an extended period of substance abuse and incarceration left him homeless and his reputation shattered.  Caine entered recovery, became educated, and began his career in residential addiction treatment at Beit T'Shuvah.

Shattered Glass (Britney Spears song): "Shattered Glass" is a song recorded by American recording artist Britney Spears.  The song was written by Lukasz "Dr. Luke" Gottwald, Claude Kelly, Benjamin "Benny Blanco" Levin, and produced by Dr. Luke and Benny Blanco for Spears' sixth studio album, "Circus" (2008).  "Shattered Glass" is an uptempo pop song, while Spears' vocals have been Auto-Tuned on the track.  Lyrically, the song is very emotional, with Spears singing of entrapment and self-loathing in her relationship with fame.

Shattered Glass (Laura Branigan song): "Shattered Glass" is a song written by Bob Mitchell and Steve Coe which was originally recorded in 1980 by Ellie Warren.  The song was recorded in 1987 by Laura Branigan with the Stock Aitken Waterman production team to serve as the first single released from Branigan's fifth album, the 1987 release "Touch".

Shattered (song): "Shattered" is a song by The Rolling Stones from their 1978 album "Some Girls".  The song is a reflection of American lifestyles and life in 1970s-era New York City, but also influences from the English punk rock movement can be heard.

Electricity (Captain Beefheart song): "Electricity" is a song by Captain Beefheart and his Magic Band on the 1967 album "Safe as Milk".  Beefheart claimed the label he and his band were signed to, A&M Records, dropped them after co-owner Jerry Moss heard the song and declared it "too negative" for his teenage daughter to listen to.  Beefheart's vocals, while recording the final version for the album, shattered the microphone.

Supporting paragraphs: Shattered (Turn the Car Around) O.A.R.
Answer: Marc Roberge