When Amy Winehouse answered the door... topless!

Pop star Amy Winehouse apparently proved she is not a regular woman by opening the door to a group of strangers almost naked.

The 'Rehab' singer, who returned to London from a two-month break in the Caribbean to battle her drug addiction, was said to have ordered a tanning bed, Fox News reported.

The troubled pop star, in the middle of a divorce with jailbird hubby Blake Fielder-Civil, reportedly answered the bell clad in just a bikini bottom when the delivery personnel arrived.

Meanwhile, Winehouse is said to be turning to former Spice Girl Melanie Brown to shed the extra pounds piled on during her holiday in St Lucia.

The 'Back to Black' star was purportedly following Brown's fitness DVD, which includes a four-week plan for all fitness levels, to get back in shape.