Big Bang will release a new track... No, not as their own single, but instead the new track will be for the IRIS OST (soundtrack). Big Bang member T.O.P. is part of the cast for IRIS, so it's no surprise that Big Bang will be doing a track for the hit drama. The new track will be titled "Hallelujah" and is rumored to be released via online music portals on October 28, 2009. 1TYM member Teddy produced the track and it reportedly was co-written by both Teddy and G-Dragon. Whenever the track is released we'll make sure to have it up, also remember to visit the BBVIP Forums.