Ariana Grande probably picked up this houndstooth sleeveless sweater and knit shorts by Japanese Streetwear brand GYDA when she was in Japan over the holidays. GYDA’s official webstore is all in Japanese but you can buy the top and shorts for approximately $24.23 each. They are also available worldwide on Rakuten but it costs more: $33.96 for the top and $34.01 for the shorts.