Before Lindsay Lohan took on the role of Cady Heron in Mean Girls, she was an adorable 12-year-old in the 1998 classic, Parent Trap.
In the movie she played identical twins who, after being separated at birth, are each raised by one of their biological parents.
They (not-so randomly) find each other at summer camp, and then spend the rest of the movie trying to bring their parents back together again.
And since Lilo doesn't really have a twin, some serious CGI was used in the movie, BUT, Lindsey also needed a body double.
The girl had to look EXACTLY like Ms Lohan so that the audience thinks it's her twin when you don't see her entire face.
And that's where Erin Mackey comes in, who was a full seven years older than Lindsey. Erin is on the right in the photos with her on-screen fam:
And this is Erin now. She went on to become a major Broadway performer, has starred as Glinda in Wicked, and has also won numerous awards for her kick-ass voice.
Irish model Shahira Barry has been cast as a Kim Kardashian body double for a new advertisement on the entertainment channel E!.
The Galway girl wrote about her experience on her blog where she gave readers a little insight into her day working along side the Kardashian-Jenner clan.
Shahira explained that she didn't even apply for the job, she was just picked at random after a job she undertook in the past and she "was booked as Kim's stand-in".
As Kim is one of the most photographed women on the planet with thousands of women wanting a body just like hers it must have come as a happy surprise for Shahira. "I was very flattered and it was definitely a confidence boost!" she admitted.
According to the model, the famous family are even better looking in real life. "Kris, Kylie, Kendall, Kourtney, Kim and Khloe were all there along with their glam squad and a large production group. WOW they are one beautiful family! I think they are actually better looking in person," she wrote of her experiences on set.
Shahira gave us an insight into the lives of the stars saying, "Personality wise they were all the same as they are on TV which is refreshing!"