The Mayor of London, Boris Johnson, said: "Last summer the palpable buzz of this great city was beamed across the globe. Since then London's draw has gone from strength to strength with billions of pounds of international investment and huge regeneration projects continuing apace.
"These fantastic tourism figures not only support new jobs and growth in London's economy but are yet another testament to the Olympic legacy."
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Transport for London teamed up with a host of recognisable voices to encourage Londoners to support the Royal British Legion.
She will be joined by chart acts Rixton and Jess Glynne when she presses the button for the festive illuminations on November 6.