Today's Surprise Guest: Steven Tyler of Aerosmith

In the show's second hour, Gary ushered in a surprise guest--Aerosmith lead singer and current 'American Idol' judge Steven Tyler. Robin was the most surprised: "Oh my god!" Steven greeted the crew and introduced them to his girlfriend, Erin Brady. Howard immediately asked about their sex life, so Steven joked that they were into S&M: "She showers, I masturbate."