Lauren Jauregui arrived at the Capital FM Summertime Ball with her bandmates wearing a Forevwe 21 Boxy Muscle Tee (Sold Out), the Moto Black Rinse Jamie Jeans ($70.00) and a pair of Astrix Platform Boot (Sold Out) both from Topshop. You can get the look with a Forever 21 Cutout Muscle Tee ($8.90).