Listen to The World's Greatest (In The Style Of R Kelly) online. The World's Greatest (In The Style Of R Kelly) is an English language song and is sung by Ameritz Karaoke Band. The World's Greatest (In The Style Of R Kelly), from the album Karaoke Classics For Boys Vol. 12, was released in the year 2010. The duration of the song is 4:01. Download English songs online from JioSaavn.