Listen to 2x4 (Karaoke Version) [Originally Performed By Metallica] online. 2x4 (Karaoke Version) [Originally Performed By Metallica] is an English language song and is sung by Anne Regler. 2x4 (Karaoke Version) [Originally Performed By Metallica], from the album Best Of Metallica, Vol. 1 (Karaoke Version), was released in the year 2015. The duration of the song is 5:38. Download English songs online from JioSaavn.