ET Crashes Kirstie Alley's Slumber Party

ET Crashes Kirstie Alley's Slumber Party

ET's Rob Marciano found himself in bed with Kirstie Alley and Kelly Preston at Kirstie's classic Wichita mansion, but there was a catch.

Before hopping into the sack, Rob had to don a pair of monkey pajamas to match the attire of the rest of the A-list slumber party.

The occasion was organized to celebrate the weight-loss winners of Kirstie and Kelly's Challenge to Change contest, sponsored by Kirstie's weight-loss program, OrganicLiaison.com.

The most dramatic success story belonged to Kim Taylor. She lost approximately 160 pounds after maxing out at roughly 330 pounds.

"When I went to the doctor and was told I had some health conditions and that it was either lose weight or get diabetes, I said, 'Now we're going to go on a diet,'" said Taylor.

Watch the video for more.