olivia is wearing one of the hottest trends this season, that is the birkenstock sandal. >> birkenstocksis wearing a sandal by zara, just $99. white is the key color for accessories this season. it's not just about jeans and shorts. with the new birkenstock styles, it's all about wearing it day tonight. >> show me some of these other sassy sandals. >> look at these gladiator sandals, knee-high, taken to the extreme. and the block heel, a derivative for the '70s. >> everybody hold on to your hats. we have to get to the third trend. this is more the platforms. this is the perfect platform. at guilt, what we love about a platform, they're comfortable and stylish. they make it feel like a sensible two-inch heel. divia is wearing this by lulu, just $49. what's great is the pattern, a stripe. don't be afraid to mix patterns. then, you know, lots of other fun platforms. >> platform pennys. >> remember feels like a pump looks like a sneaker. this is looks like a sneerer, feels like a pump, but in a good way. then the platform, all the rage. this is about extreme height. it's a flat platform. the