Katharine McPhee rocks bikini weeks after giving birth to son with David Foster

Twinning! Katharine McPhee and her baby boy, Rennie, looked cute as can be in matching swimsuits during the Foster family vacation in Turks and Caicos on Monday, April 5.

Katharine McPhee is opening up about motherhood.

The Kelly Clarkson Show. During the 37-year-old singer's appearance, the topic of conversation focused on her newborn son, Rennie David, whom she welcomed earlier this year with husband David Foster, 71.

Katharine McPhee guests on Monday’s edition of “The Kelly Clarkson Show”, and the new mom gushed about recently welcoming her first child, son Rennie, whom she shares with husband David Foster.

Katharine McPhee continues to bask in the glory of her post-baby body. The singer-songwriter, 37, who welcomed her first child, son Rennie David, with husband David Foster, in late February, showed off her newly-acquired curves in a selfie snap shared to her Instagram Story on April 1 as she modeled a one-piece tie-dye swimsuit created by her stepdaughter, Sara Foster, 40.

Round two! Two days after showing her postpartum bikini body, Katharine McPhee rocked a one-piece bathing suit.

 Katharine McPhee  is one happy mama! The 37-year-old recently gave birth to her and  David Foster ’s baby boy only five weeks ago and McPhee is glowing and looks fabulous. A post shared by Katharine McPhee Foster (@katharinefoster)On Tuesday, the former American Idol singer posted to her Instagram stories a photo of herself in the mirror posing in a brown one-shoulder, high-waisted bikini with matching sunglasses.

It’s been just over a month since Katharine McPhee and David Foster welcomed their baby boy Rennie and she is showing off her body in a few new bikini selfies!

Hot mama alert! Katharine McPhee lit up Instagram with a stunning bikini photo, just five weeks after giving birth to her first child. Kat, 37, posed for a classic mirror selfie in her bathroom, decked out in a retro two-piece, tinted beige sunglasses, and gold earrings. She explained to her fans why she’s embracing the way her body looks (incredible, obviously) after welcoming baby Rennie Foster into the world.

Katharine McPhee is loving her curves since giving birth to her son, Rennie, with husband David Foster in late February. On Tuesday, the 37-year-old actress and singer took to her Instagram Stories to show off her trim figure in a brown high-waisted bikini and shades. In one mirror selfie, McPhee wrote, «Loving my curves because my baby gave them to me.» The alum previously opened up about not putting pressure on herself to bounce back to her pre-baby body too quickly. «I thought I would have

Bikini body! Katharine McPhee sported a bathing suit five weeks after giving birth to her and David Foster’s son, Rennie.

'ready for spring' wearing a white Valentino blouse tucked into a matching pleated skirt, and heels on Tuesday. It's only been five weeks since the 37-year-old LA native welcomed her first child - son Rennie David - with her second husband, 16-time Grammy winner David Foster.

A birthday calls for a celebration outside the house. This led Katharine McPhee to ring in her 37th birthday by stepping outside with her 71-year-old husband, David Foster, and their newborn son Rennie on March 25. The family of three ventured out to Beverly Hills for brunch, where they were all pictured together for the very first time in public! You can see the first photos of Katharine and David with their son in public, here.