Washington, Nov 16 Singer Leona Lewis has rubbished reports that she has gone under the knife to boost her assets.

The 'Bleeding Love' hitmaker had shown off a fuller figure over the last few weeks, sparking rumours she has had cosmetic surgery.

However, she insists that her assets are all natural.

In fact, she blames her inflated boobs on recent weight gain.

"Every few months I get people asking me if I've had a boob job. No, I haven't," Contactmusic quoted Lewis as saying.

"With me, every time my weight goes up or down a little bit, it's so noticeable there and people start to speculate about it. But, no, they aren't fake," she added. (ANI)