Simplify the following text for a Grade 7 native English-speaking person.
Original: The Amazing Jeckel Brothers features guest appearances by rappers Ol' Dirty Bastard and Snoop Dogg , and additional contributions by The Jerky Boys and Twiztid .
Simplified: The album featured guest vocals such as Ol' Dirty Bastard , Snoop Dogg , The Jerky Boys and Twiztid .