Bollywood's actors Abhishek Bachchan and Aishwarya Rai Bachchan released the soundtrack of their forthcoming film 'Raavan' in Mumbai.Directed by renowned filmmaker Mani Ratnam, real-life couple Abhishek and Aishwarya play the lead roles.The launch was unique with songs and music from the film being performed by the actors.The film's music director, Academy Award-winner A R Rahman sang a song whilst lyricist Gulzar read out lyrics written by him. The soundtrack has six songs.Aishwarya was the compere for the evening in compliance with the director's wishes, she told reporte...