Despite singing in a TV ad for Topshop the actress is not a fan of showing of her musical abilities.

The 30-year-old actress faced up to her fear of singing in public last year to star in a Christmas ad for highstreet clothing company Topshop.

The actress performs atop a piano in the promo, which was filmed by her husband Michael Polish, and recently admitted the experience was "white-knuckling".

She said; "I was surrounded by people I didn't know, singing a rendition of Winter Wonderland."