The collection will be available online and in select stores on March 23rd in the U.S. and March 30th globally, with prices ranging from $5.99 to $49.99. And while The Atomics won't arrive in Indio, Calif. until April, they'll be doing a free performance at H&M's Times Square store in NYC on March 16th (where a couple of fans will get to hang with the sibling act pre-performance). Check out the full video, below, and then click through for some looks from the collection, plus the Smith siblings' take on festival style and more.