She defeated fellow Welshwoman Julie Gore 2–0 in the quarter-finals, and Karen Lawman 2–0 in the semi-finals.

[3] In 2011, she again reached the World Championship final after victories over Gore in the quarter-finals and Deta Hedman in the semi-finals.

[4] In 2012, O'Sullivan was defeated in the first round by top seed and eventual runner-up Hedman.

O'Sullivan is not a full-time professional darts player, and works as a childcare nursery nurse.

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