Earnshaw attended Ysgol Glan Clwyd[1] and also played for Bangor City Girls in the FA Women's Premier League Northern Division.

[2] In November 2000, a 15-year-old Earnshaw scored twice against Charlton Athletic in an FA Women's Premier League Cup tie.

[4] After spending a period with Barnet in 2002–03,[5] Earnshaw helped Arsenal win a domestic double in 2003–04.

[1] She then moved to the US to play varsity soccer while attending Iona College (New York).

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