Musical > Olivier the best actress in the last decade

Who is you best actress in a musical, who has won a Olivier in the last decade?

Elena Roger for Piaf
Leanne Jones for HAIRSPRAY
Jenna Russell for SUNDAY IN THE PARK WITH GEORGE at Wyndham's
Jane Krakowski for GUYS AND DOLLS at the Piccadilly
Laura Michelle Kelly for MARY POPPINS at the Prince Edward
Maria Friedman for RAGTIME at the Piccadilly
Joanna Riding for MY FAIR LADY
Martine McCutcheon for MY FAIR LADY at the Lyttelton and at the Theatre Royal, Drury Lane.
Samantha Spiro for MERRILY WE ROLL ALONG at the Donmar Warehouse
Barbara Dickson for Spend Spend Spend, at the Piccadilly

Samantha Spiro (just beating Jane K).

Joanna Riding.