While showing fashion expert Jeannie Mai a preview of her pop-up store for her House of Harlow 1960 line at The Grove in Los Angeles, Nicole gave ET a summer fashion fix.
"My go-to's are the vintage silk camisoles," Nicole said. "I think you can wear them with anything."
Nicole met Jeannie in a yellow sundress from her collection that costs $225.
"The first time people are going to see the collection is in the actual store," Nicole said. "And I'm hugely inspired by the '60s and '70s. Obviously I love the music of that time. I love the overall freedom."