Out of all the jeans on the market—both past and present—none are as iconic as Levi's® 501®'s. This year marks the 150th anniversary of the 501® collection, but it's not just their history that has earned these jeans their icon status with celebs and fashion editors—the expertly designed fits, washes, and fabrics speak for themselves. Who What Wear's very own Kristen Nichols is one of the many, many fans of the 501®'s. (Her go-to pair is the Original Fit.) She's been styling them so many ways lately, but her favorite way to wear them is with a matching denim shirt for an on-trend denim-on-denim look that feels fresh for spring. Get Kristen's outfit details and discover more of her top picks from Levi's® below.