<Tr> <Td_colspan="2"> List of Grey's Anatomy episodes </Td> </Tr> <P> "Song Beneath the Song" also known as Grey's Anatomy: The Music Event, is the eighteenth episode of the seventh season of the American television medical drama Grey's Anatomy, and the one - hundred forty - fourth episode overall . It was named after a song by American singer Maria Taylor . Written by series creator Shonda Rhimes and directed by Tony Phelan, it premiered on ABC in the United States on March 31, 2011 . It is the series's first musical episode, and features the cast performing songs previously featured within the program . It is accompanied by a soundtrack album, titled Grey's Anatomy: The Music Event, also released on March 31, 2011 . </P> <P> The episode revolves around Callie Torres (Sara Ramirez) and Arizona Robbins (Jessica Capshaw), just after they are involved in a vehicular collision . Various songs are performed by the cast members, as they attempt to save the life of Torres . Rhimes originally idealized the episode at the conception of the drama, while the show remained untitled . The episode opened to mixed reviews from television critics, and it was the second most watched program of the night . "Song Beneath the Song" was ranked in several "best and worst" lists, and the soundtrack was included on the Billboard 200 . </P> <P> En route to a weekend getaway, surgeons Arizona Robbins (Jessica Capshaw) and Callie Torres (Sara Ramirez) are involved in a vehicular collision, moments after Robbins proposes marriage . Torres suffers severe injuries, which endanger both her life and the life of her unborn child . She and Robbins are taken to Seattle Grace Mercy West Hospital, the institute at which they both work . Their colleagues attempt to save Torres, while Robbins and Mark Sloan (Eric Dane), the father of Torres's baby, stand by . Torres's many injuries include neurological trauma . While barely conscious, she hallucinates an uninjured version of herself standing beside her . The hallucinatory Torres begins to sing, and is gradually joined by the doctors treating her . This singing continues throughout the episode, as Torres's projection of herself attempts to reach out to Robbins . </P>

Grey's anatomy episode where callie is in car accident
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