Pregnant singer Shakira proved that she hasn't lost any of her sex appeal by posting a sizzling nearly nude photo posing with boyfriend Gerard Piqué on her Twitter page.

The artfully shot black-and-white image features the 35-year-old mom-to-be in a flesh-colored bikini top and skirt smiling excitedly as her child's footballer father holds her bulging belly  from behind.

“We’d like to celebrate the imminent birth of our first child with all of you. #babyshower," the Colombian-born hip-shaker wrote on Twitter.

The tasteful family photo was taken by Jaume Laiguana and coincides with the couple's pledge to donate proceeds of their world baby shower to UNICEF to help save less fortunate children's lives.

Presents such as mosquito nets, polio vaccines and baby-weighing scales can all be bought on the site with each item to be distributed to children and communities in some of the poorest corners of the globe.

"As you all know, we will soon be welcoming our first child into the world, and to celebrate his birth we've organized a virtual baby shower in association with UNICEF," reads the personal message from the charitable pair on the online invitation.

"In lieu of receiving gifts for our baby as with a traditional shower we would like to offer support