Is that Ellie behind mask? Of corset is...

ELLIE Goulding proves she is way out in front when it comes to risque outfits as she mingles with royalty and fellow stars at a party.

- Jan Disley

The masked singer, 37, stunned onlookers as she wore a sheer, corseted black gown with thigh-high split at the bash to celebrate the 10th anniversary of top London nightspot Chiltern Firehouse.

Like many guests, she donned a Venetian-style mask to fit in with the party theme.

However, Princess Beatrice, 36, opted for a more conservative look.

She had announced she was pregnant with her second child the previous day.

Clutching a silver mask, the late Queen's granddaughter wore a classic black velvet jacket and wide-legged slacks.