Enrique Iglesias in his song Hero, uses a vocal technique where he somehow stresses beginning of many phrases that sound especially "croaky", starting with "~~~Would you dance...", where "~~~" refers to the "croaky" sound. In fact there is a pun video tutorial where someone pokes fun at this technique. I do not agree with the video, because I think that the "croaky" sound sounds very "intense" and fits the song, but sharing it just to highlight the parts I am referring to.
The above is just an example to establish a reference. So the question is, is this a specific vocal technique that can be developed with a method ? If so, can someone elucidate the technique and the method to develop it ?