According to reports, Jon - who produced and performed on the number one track - is bitter all the glory was heaped on Usher after the tune topped the charts in America and Britain.
A source tells website PAGESIX.COM, "Lil' Jon seriously hates Usher.
"He feels like he was responsible for the success of Yeah!, which he was. He produced the song and sang on it. He likes to mock Usher by saying his name in a little high voice and calls him Baby Usher."29/12/2004 19:15