Al Yankovic (more commonly known as Weird Al) was a voice-actor and guest star along with Alice Cooper, Maria Menounos and Bret Michaels on "The High Fructose Adventures of Annoying Orange" during the episode "Generic Holiday Special". They were seen trying to spruce up the special episode and review all of the holidays of the year within a full standard episode (11 minutes).
So far, he has only played Bruce Dillus and was also a featured guest on "The Marshmallow Show".