Hey, It's That Guy!: The video and single from their Extraterrestrial Live album was a cover of The Doors' "Roadhouse Blues", recorded with Doors guitarist Robbie Krieger.
"When the War Comes", on Club Ninja, featured a spoken-word intro by a then-relatively-unknown New York DJ named Howard Stern.
The group's current bassist Rudy Sarzo previously played in a slew of other metal groups, including Quiet Riot, Whitesnake, and Dio. The group often pays homage to this by including an instrumental medley of those bands' songs in the middle of "Godzilla".