(CBS) If you're interested in the latest interior design trends, touring a decorator show house is a great way to see a lot in a small amount of time. On Friday morning, The Early Show wrapped its "Inside Style" series with a visit to one magnificent show house near Washington, D.C.

"It's interesting because you start with a house that's totally empty," says Lynni Megginson, one of 24 interior designers who are each decorating one room in the mansion. "Everyone's doing a totally different space. Every single designer has contractors and painters and wallpaper guys and furniture deliveries.

As Megginson explains it, "Primarily, decorator show houses are a great way to show talent from local designers, and, generally, they're done as a fund raiser. This particular show house, the NSO, benefits the National Symphony Orchestra.

"Design these days is all about the mix," Mitchell says. "It's all about this beautiful eclecticism. Its almost like design has gone global. There's pieces in this room that are from France, from Sweden, from China. There's lots of African pieces in this room. It's all about how it forms a cohesive kind of feeling for the space.

Mitchell says there are "wonderful rooms in the house. The great thing about a show house is that you get to go through, and in this case, you get to see 20 or so designers. You get to see different points of view. You get to see different trends that designers think are happening right at the moment."

She says, "I wanted to create a room that was ethereal, a place that's very tranquil, but also wanted to have a sense of luxury. And so we started out with a corona over the bed. The pattern on the fabric, which you see on the draperies and one of the upholstered pieces, is then repeated onto the walls by a hand-painted process."