Lose 10 Years in 60 Minutes With the 'GMA' Time Machine

Super stylist Gretta Monahan helps Leah Burg get a brand new look.
3:00 | 03/28/14

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Transcript for Lose 10 Years in 60 Minutes With the 'GMA' Time Machine
back from the time continuum. Time for the final big reveal. We have just loved doing this for our "Gma" viewers, our "Gma" time machine. Leah, you can see she entered it. One hour ago. We promised she would lose 10 years in 60 minutes with the help of our dream team headed by Gretta Monahan and Bobbi brown. Before the big reveal first Leah's story. ? Reporter: When Leah berg heard about "Gma's" "Lose 10 years in 60 minutesst series she viewed it as a sign. I feel I have aged quite a bit. When I look at myself in the mirror, I do have a lot of dark circles under my eyes. A lot of sun spots. Reporter: At work, among family, Leah is frequently told she looks older than she is. And people we spoke with on the street agreed. How old do you think she is? 47. 45. 52. Reporter: But Leah isn't in her 50s or even 40s. What would you say if I told you this woman here is actually 34. That's right. Leah is just 34. Leah attributes her older appearance to the stress she's endured since her youngest daughter was diagnosed with a rare form of eye cancer four years ago. A multitude of doctors' appointments and rounds of chemo followed with her daughter now on the road to recovery, Leah says she's ready to lose ten years. For her family and herself. Looking younger would give me more confidence. It would just be awesome to get back to how I used to look and then hopefully keep up with it now that Brittany is doing amazing. Reporter: Will our beauty dream team succeed? Find out now. Moment of truth right now. We are nearing, I don't even know, are we at zero. Open up the time machine. Here is Leah. Right here. Stay right here. Get the camera. And now, Leah, take a look in the mirror. Seeing herself. So beautiful. Come over here. What do you think? I can't believe it. Thank you so much for that. The last four years with Brittany with her cancer and she deserves this. She really deserves this. How do you feel? I feel awesome. When you looked in the mirror did you feel 10 years younger? Yeah, I look awesome. Thank you. I love hearing that. Tell us about yourself. You deserve it and dream team, thank you so much for your generosity all week led by the great Gretta Monahan. You've got two terrific -- Cut and color and print, this is what makes us look younger and feel great and also show off your form. Stop wearing those big clothes. Those are my two tips if people have -- always buy things too big. I always say it. Bobbi brown, thank you. What can you share? Yellow tone foundation evens out your skin. She had a lot of red in her skin. Yellow tone. If you have to test it on the face and eyebrows, if you color your hair make sure the color you choose is the color of your hair. Pencil or brush-on brow. Two great tips and more. I want to thank you so much. Dr. David Rosen, you whitened the teeth. Congratulations. Enjoy it and it's Friday. I hope there's going to be a little party. Mom, thank you for coming. Been a really wonderful thing to do and great tips for you. Go to goodmorningamerica.com on Yahoo! If you think you might -- well,

This transcript has been automatically generated and may not be 100% accurate.

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