Listen to Shelter - Heavy Rock Groove, Tough Instrumental online. Shelter - Heavy Rock Groove, Tough Instrumental is an English language song and is sung by Royalty Free Music. Shelter - Heavy Rock Groove, Tough Instrumental, from the album Royalty Free Female Vocals and Rock Songs Instrumentals, was released in the year 2013. The duration of the song is 2:52. Download English songs online from JioSaavn.