5 Seconds of Summer's Michael Clifford recently made a surprise appearance in a commercial, after accidentally being filmed wandering around the airport! Despite being torn up over his prolonged separation from the rest of his bandmates, he joked on Twitter that his "life is complete" now that he's been in a MasterCard commercial.

Click through to see more commercials secretly starring your favorite celebrities, and let us know which one shocked you the most in the comments!