Short answer: Orchard Road and Marina Bay Sands are the two big hubs for high‑end fashion — plus a few boutique streets/neighbourhoods for designer and local labels.

Where people usually shop for high‑end fashion in Singapore

• Orchard Road — the city’s premier shopping strip, home to luxury malls and flagship stores (ION Orchard, Paragon, Mandarin Gallery, Ngee Ann City/Takashimaya). Great for international designer houses and department‑store shopping. (southeast-asia.com)
• The Shoppes at Marina Bay Sands — the waterfront luxury mall with many flagship and duplex boutiques (including the Louis Vuitton Island Maison) and concierge/personal‑shopping services. (marinabaysands.com)
• High‑end malls and precincts off Orchard — Scotts Square, Knightsbridge, Paragon and nearby boutique malls house brands like Alexander McQueen, Christian Louboutin, Balenciaga and similar names. Good for quieter, curated luxury shopping. (southeast-asia.com)
• Department‑store anchors — Takashimaya at Ngee Ann City and TANGS carry premium fashion labels and are useful one‑stop places for luxury goods. (southeast-asia.com)
• Boutiques and local designers — Design Orchard (Orchard), Duxton Hill / Tanjong Pagar, Dempsey Hill and parts of Tanglin/Cluny Court are where you’ll find Singapore designers and smaller multi‑label boutiques for distinctive pieces. (thelocaldora.com)

Quick tips

• If you want flagship stores and the widest selection of European luxury brands, prioritize ION/Paragon/Ngee Ann City (Orchard) and The Shoppes (Marina Bay Sands). (southeast-asia.com)
• For unique local designers and limited runs, visit Design Orchard, Duxton Hill and Dempsey Hill. (thelocaldora.com)

If you’d like, I can: give a short walking route for Orchard Road, list specific designer stores you’ll find at each mall, or recommend where to try pre‑owned/consignment luxury in Singapore. Which would you prefer?