Dude looks like a lady!

Steven Tyler made a special appearance on American Idol as a sexy contestant named "Pepper."

The 64-year-old Aerosmith frontman walked on stage and said to judges Randy Jackson, Mariah Carey, Keith Urban and Nicki Minaj:

    "My name is Pepper. I'm going to sing a song called 'Tell Your Ma, Tell Your Pa, Our Love Going to Grow, Wah Wah'."

Even AI host Ryan Seacrest wigged out! Steven definitely deserves to go to Hollywood for this one!