Mgbe Crisp gbasasịrị na 1997, Sia kwagara London, ebe ọ rụrụ dị ka onye na-agụ egwú na-agụ egwú maka ìgwè Jamiroquai nke Britain. N'afọ 2000, o nyekwara ndị na-edu ndú na-abụ abụ maka ndị Bekee na-agbanye ụda olu Zero 7 na mbụ ha atọ studio albums ma soro ìgwè ahụ gaa njem. Na Zero 7's 2001 album Simple Things, Sia nyere olu olu na egwu abụọ: "Destiny" na "Distractions". Otu "Destiny" ruru No. 30 na UK Singles Chart. Na 2004, o nyere olu maka Zero 7 na "Somersault" na "Speed Dial No. 2" (site na album When It Falls). Na 2006, Sia rụkọtara ọrụ ọzọ na Zero 7 maka album nke atọ nke ìgwè ahụ, The Garden Garden, ma si otú a na-ewere ya dị ka "onye na-abụghị onye na-edu ndú" nke Zero 7. Na 2000, Sia bịanyere aka na Sony Music na-edekọ egwu egwu egwu egwu na egwu egwu egwu egwu egwu egwu egwu egwu egwu egwu egwu egwu egwu egwu egwu egwu egwu egwu egwu egwu egwu egwu egwu egwu egwu egwu egwu egwu egwu egwu
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