The Burn singer bares her fit tum

Ellie Goulding has been flaunting her killer abs in a very revealing outfit.

The blonde songstress donned a sexy crop top and matching tight skirt to perform on the Italian X Factor on Friday night.

Ellie, 26, thanked the designer of the saucy get-up by posting two hot selfies on Instagram.

Mark Fast you rule,’ the Burn singer wrote.

#markfast X FACTOR!

Ellie’s clearly proud of her very toned tum – the day after her performance she flashed her stomach yet again in a black sports top.

#work,’ she captioned the Instagram snap.

She might have been looking good but Ellie’s busy schedule left her feeling exhausted during the Halloween celebrations.

Came back from Milan, finished my shoot at 7.30, grey contact lenses havnt worked, didn’t have a plan B. Where’s the vodka #halloweenfail,’ she Tweeted on Saturday.

SEE PICTURES Ellie Goulding at the Les Miserables film premiere in London

SEE PICTURES Ellie Goulding squeezes into leather leggings for an appearance at Radio 1

SEE PICTURES Ellie Goulding looks a bit chilly on the set of Extra at the Grove in LA

Anna Francis