Summer's here -- Think you don't need sunscreen? Think again!

New stats show that only 1 in 4 men wear sunscreen when they're exposed for 4 hours or more. With women, it's a little less than half who will wear sunscreen. The real danger, however, comes when the parents of young children don't apply sunscreen to their kids.

Sunscreen does not have to be expensive. Clark always buys his at the dollar store, though one staffer on the show spent $22 on a bottle. Another spent $7.

When buying sunscreen, be sure to select one that's at least 15 SPF. You can go as high as 30; any higher than that probably won't be any more effective.

The key is to apply tons of the stuff and reapply as needed, especially after the pool or ocean -- even if it says it is waterproof.

Meanwhile, Christa warned people about the dangers of getting too much sun exposure on their arms and face while driving around in their cars. She uses a moisturizer with a built-in SPF 15 level of sunscreen protection.