I have no idea how that is made to be humanly possible. I was baffled by it the first time I heard it a year ago, and I'm still baffled to this day. I was actually trying to figure out who was making that sound, but I couldn't figure out who. Hehe.
oo nga eh, hinahanap ko sa video, but they were all mouthing normal words. haha. super galing ng soloists. pag ako kinantahan ng ganyan, kahit hakuna matata pa, i'm marrying him in an instant.