He also voiced several characters in Shrek 2 .
He also sang in Murphy 's place in the Shrek extra ending , Shrek in the Swamp Karaoke Dance Party and Donkey in the Shrek video games .
He also voiced several characters in Shrek 2 , and sang in Murphy 's place in the Shrek extra ending , Shrek in the Swamp Karaoke Dance Party and Donkey in the Shrek video games .