I'm The Tooth Fairy

At Carly's, Tess sees Derek taking her tooth, but she promises to keep it a secret, and Derek apologizes to Randy and encourages him to keep pursuing his dreams, using his magic wand to grant Randy a new guitar. Downstairs, Carly sees him as a tooth fairy, but assumes that he rented a costume for Tess' sake, causing her to forgive him. Derek flies Randy to the talent show and throws Amnesia Dust on him when they arrive.