POPSUGAR Beauty Aside Celebrity Cameos by Beauty 9/21/08 0 Shares Like us on Facebook Sign up for our daily newsletter > Follow us on Pinterest Click to ReadCelebrity Cameos Mary-Kate pops by the set of Samantha Who? for a guest role on the show. Want to see other stars who dropped in for a quick TV appearance? InStyle.com has a whole slew of 'em. Read More Aside Aside Cyber Monday Deals and Steals Cyber Monday Deals and Steals Brunch Ideas For Christmas Check Out This Elegant Fall Wedding in an Old Textile Factory POPSUGAR, the #1 independent media and technology company for women. Where more than 75 million women go for original, inspirational content that feeds their passions and interests. Stay Stylish With OurFashion and Beauty Newsletter Personalize Celebrity Style Street Style Fashion and Beauty News Beauty Tips Sign up with facebook or By signing up, I agree to the Terms and to receive emails from POPSUGAR.