Short answer — where to look

• Mid‑range / local brand stores: Love, Bonito (Singapore-based) and similar mall brands often carry pastel, tulle and chiffon dresses that fit the “balletcore” look. (en.wikipedia.org)
• Online multi‑brand retailers in Singapore: Zalora (big local selection), Pomelo and ASOS/Zara/H&M online storefronts serving SG — good for pastel sheers and tulle overlays. (Carousell.sg)
• Pre‑owned / local marketplace: Carousell Singapore has many tulle/sheer/pastel dresses (new & preloved) tagged “balletcore,” “tulle” or “sheer.” Great for one‑off finds. (Carousell.sg)
• Independent boutiques & shopping streets: Haji Lane, Arab Street and Bugis / Bugis+ area (small indie boutiques) — you’ll find romantic tulle, chiffon and coquette styles there. (These neighbourhoods are known for indie/fashion boutiques.) (Carousell.sg)
• Vintage and handmade marketplaces: Etsy and local vintage sellers/shops — good for unique pastel mesh or vintage chiffon pieces. (Etsy.com)

Where to shop specifically (online + physical)

• Love, Bonito — Singapore brand with frequent feminine silhouettes and pastel collections; check their SG site or Orchard/ionic mall stores. (en.wikipedia.org)
• Zalora Singapore — large selection and filters for fabric (tulle/chiffon), colour (pastel) and style (party/dress). Good first stop to compare many brands at once. (Carousell.sg)
• H&M, Zara, & Other Stories (Orchard/ION, VivoCity, Jewel etc.) — fast‑fashion stores regularly release tulle and sheer pastel dresses in seasonal drops. Search their Singapore online shops and stores on Orchard Road. (poshmark.com)
• Carousell Singapore — search terms: “tulle dress”, “sheer dress”, “pastel dress”, “balletcore”. Many listings are local so you can view items in person or meet up. (Carousell.sg)
• Etsy / Depop / international resale — for vintage or handmade balletcore pieces; note shipping times/costs to Singapore. (Etsy.com)

Practical tips to find the exact “balletcore pastel sheer” dresses

• Search keywords: “tulle”, “sheer”, “mesh”, “chiffon”, “tulle overlay”, “pastel pink/blue/lavender/butter”, plus “balletcore”, “coquette”, “fairycore” or “romantic”. Use these on Zalora, Carousell and store sites. (Carousell.sg)
• Check lining and opacity: many sheer/tulle dresses are lined in the body but have sheer sleeves/overlay; if it’s fully sheer you’ll need a slip or bodysuit underneath. (Product pages usually list lining.) (Carousell.sg)
• Try rental or preloved if you want statement tulle (cheaper and eco‑friendly): look on Carousell for short‑term hires or preowned finds. (Carousell.sg)
• Visit Haji Lane / Bugis on weekends for indie boutiques and one‑off pastel pieces — sellers there often carry feminine, balletcore‑adjacent styles. (Carousell.sg)

If you want, I can:

• Search Zalora / Love, Bonito and Carousell right now and list 5–10 active listings (with links) that match “balletcore pastel sheer” for delivery/pickup in Singapore.