Sorry for the black and white photo, it’s the only one I could find that shows the identifiable details. Hers are the blue “dark rinse” color.
Abercrombie and Fitch Macey Shorts in Dark Rinse – $19.95 [exact]

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Abercrombie and Fitch Macey Shorts in Dark Rinse – $19.95 [exact]

I don’t think either of these are exact. With the sweatpants, you can cut them so they’re like Sierra’s. That would be something she would do, haha.
Victoria’s Secret Pink Lounge Short – $18.50 [similar]
Forever 21 Abbie Denim Short – $19.80 [similar]
Urban Outfitters Silence & Noise Lace Bodysuit – $28 [exact]
Forever 21 Floral Lace Shorts – $7.80 [similar]

American Apparel Stretch Twill High-Waist Side Zipper Short – $48 [exact]

Diesel Mintha 8B3 Shorts – $120 [exact]
also available here
her Ghostbusters tee was previously posted here
Siwy Women’s Black/Grey Camilla Tie Dye Shorts – $168 [exact]
complete the look with these similar items: