Asos saw sales soar 47% to £69.7m for the three months to September 30.
Asos said UK sales were up 21% to £43.7m while international sales surged 128% to £26m.
The etailer, which delivers to 167 countries, launched its US site in September. French and German versions of its website will go live by the end of the month.
Asos chief executive Nick Robertson said: “I am pleased to report continued strong sales growth, both in the UK and internationally. Our US website launched during September and we expect to be live with both our French and German websites by the end of Octobe
r 2010. With retail gross margin ahead of prior year and costs tightly managed, we expect our full year results to be in line with market expectations.”