Favorite Things for Summer

Another reason to invest in more than one pair of sunglasses is to keep up with the latest trends. For the summer of 2007, one shape trumps them all, Robert says. "Right now, it's all about the rectangle," Robert says.

If you're not sure about a perfect rectangle, look for sunglasses with modifications to the shape, such as aviator glasses. But whether you're looking for a rectangle or a modified rectangle, be sure to pick a pair with the right shape for your face's proportions.

See which sunglasses Oprah tried on during the show!

To find the right pair for you, visit Marchon.com.