Transformation

Katharine McPhee's incredible complexion is entirely by design. "I've been seeing the same aesthetician since I was 10," she once told InStyle. "In high school, skin care was one of my personal hobbies. I also wanted to be a makeup artist." Currently, her glowing epidermis is serving her well as a Marilyn Monroe wannabe on Smash!

The American Idol runner-up went the extra mile for a big red-carpet appearance. "It took me 3 1/2 hours to get ready for the American Music Awards," she told InStyle of her straightened locks and lush lashes. "That's insane. It normally takes me 25 minutes to leave the house."