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The power of Taylor Swift! The pop star was spotted wearing black shorts in New York City on Monday, and eagle-eyed Swifties were quick to find her outfit because the shorts are almost sold out on the brand’s website.

Swift, who has been on the road for the Eras World Tour, kept it casual in R13’s Crossover Short ($365) and Gathered Hem Shirt ($450), which she paired with a brown purse and matching sandals.

The cropped, long-sleeve shirt features a gathered hem and front-button closure and is available in sizes S-L, while the denim shorts are available in four different washes, including the jake black version that Swift wore.

They’re almost sold out on R13’s website, but fashionable fans can find the crossover short stocked up at retailers such as Saks Fifth Avenue, Bergdorf Goodman, FWRD, Farfetch, Nordstrom, Shop Bop, Browns Fashion and even Amazon. Looking for a discount? The asymmetrical shorts are currently on sale for $255.50 at Net-a-Porter (you can find the light blue crossover short on sale at FWRD for $169).

Besides black, R13’s crossover short is also available in lighter denim washes such as tilly, nico white and turner blue; and sizes ranging from 23-32.

And if you don’t have $350 to spend on a pair of shorts, we’ve rounded up some affordable alternatives that are perfectly on trend for summer.

See more below.

Available at PacSun, these high-waisted shorts look nearly identical to the ones that Swift wore. Unfortunately, they’re almost out of stock, but they’re also available at Princess Polly (in light blue denim), plus there’s a similar design on sale at Urban Outfitters.

The cut-off shorts pictured above, which are on sale at Urban Outfitters, are available in sizes ranging from 24-36.

These $50 denim shorts from Canadian retailer Simons feature the same diagonal button in the front, a five-pocket design and frayed trim (available in sizes XS-XL). Other options include Hollister’s Ultra-High Rise Black Denim Dad Short ($29.99) and Algode Criss Cross Short ($161).