See adorable pictures of pregnant Shakira, Gerard Pique, and their son Milan celebrating her baby shower on Monday, Jan. 19. Credit: Jaume Laiguana

The sweetest shower ever! Pregnant Shakira and her soccer stud beau Gerard Pique celebrated the imminent arrival of their second child on Monday, Jan. 19, by hosting a baby shower with a charitable angle.

The world-famous singer, 37, and Pique, 27, first thought of the idea when they were expecting their first child, Milan, back in 2012. (The couple welcomed their eldest son in 2013). Their latest "World Baby Shower" looks to benefit poverty-stricken children and mothers globally by setting up a registry of items for friends and family to purchase through UNICEF.

To kick off the campaign, Shakira, Pique, and their adorable tot Milan posed together in a sweet family portrait on Monday. In the snap, the pregnant "Hips Don't Lie" songstress — a Goodwill Ambassador for the Education Fund — wears a blush gown that accentuates her big baby bump. She and her handsome boyfriend hold their nearly 2-year-old son between them as the beautiful trio beams into the camera.

In another photo, Shak and the athlete pose prom-style as he affectionately cradles her baby bump from behind.

The singer — who announced last August that she and Pique were expecting a little brother for Milan — detailed her latest charitable endeavor with her 106.4 million Facebook fans.

"Every woman who’s expecting has the power to use the blessing of her child’s imminent birth to save the lives of other, less fortunate children around the world," the Colombian sensation wrote. "If every expectant mother having a baby shower decided to include among her gift registry some of these 'inspired gifts' that UNICEF offers, we could collectively save the lives of hundreds of thousands of children all over the globe."

She added in UNICEF's release to Us Weekly that she and Pique felt obligated to use their stardom for the greater good.

"Now that we are soon welcoming our second child, we want to help other children around the world and also contribute to a long-lasting solution for getting children living in extreme poverty the supplies they need to survive," she explained. "We also want other parents to feel compelled to do the same. With the explosion of social media, celebrities aren't the only ones who have platforms that can reach mass audiences, and we want this movement to keep going long after our baby shower has ended, so we want to invite them to host their own baby showers with UNICEF as well."

Gifts as part of the couple's World Baby Shower include midwifery kits, medical equipment, vaccinations, blankets, books, and a soccer ball.