RedOne is NOT responsible for Gaga's "explosive sound", he only featured on a couple of tracks on Born This Way. He did Just Dance with her which is easily the weakest of her singles (I said the weakest not the worst selling before someone jumps in there). In any event, she writes the melodies herself - he just co-produces occasional songs with her. I'd like to see her ditch him completely for her new album next year as his sound is overused and too generic-sounding now.