Singapore is placed in the Outer Circle of the Kachru's Three Circles Model, and has over the years developed an English which is uniquely Singaporean. This paper argues that in order to understand the ways in which Singapore English is developing its own standards and ways of speaking, a new model needs to be developed that takes culture, capital and identity into consideration. This socio-cultural perspective is one grounded in an understanding of the dualistic role of English in Singapore both as a global language and a local language. It is argued that this duality is consistent with the cultural identity of Singaporeans who negotiate fluidly between two divergent orientations--that of the global citizen and the local Singaporean. The paper explains how a culturally focused model which examines the identities of Singaporean speakers is able to provide a finer-grained and thus more explanatorily adequate account of Singapore English than previously proposed models, in particular, the diglossic analysis.