Pencil Is the New Silhouette

Two separate print ads, two different companies, and two different pieces of clothing. So why do they look so similar? On the left: Gap (every four seconds, another Gap ad is shoved down our throats) promotes Black Skinny Pants. On the right: TSE highlights its cashmere tunic. Did these two corporations hire the same advertising company? Or is the pencil simply the new silhouette?