Despite her wretched singing voice, Ruby is awarded the lead role in the school musical. When her fame goes straight to her head and her monstrous ego begins to irritate everyone, Earl recognizes a perfect opportunity to agitate the gang even more! Matching Ruby's DNA, he repeatedly clones her and her mammoth ego until the school is running rampant with Ruby's -- each one fighting for the center of attention. Billy and the gang fight hard to remain sane and, with a little help from Marcus, they discover a way to destroy every Ruby. Marcus cranks up the radio frequency on his Mega-mind, causing all of the Rubys -- and Earl's computer -- to short-circuit! Sanity is restored to Flying Rhino Junior High, and the real Ruby realizes that she doesn't have to be the center of attention -- at least not all of the time.