Katharine McPhee Gives Son Rennie Credit for Her Boobs in Breast-Feeding Selfie

Katherine McPhee has returned to the "American Idol" stage. The 37-year-old singer-actress was the runner-up of the singing competition's fifth season, losing to Taylor Hicks.

Katharine McPhee is opening up about motherhood.

Alyssa Wray absolutely nailed her performances on Sunday’s “American Idol”.

Sunday’s “American Idol” was jam packed with big performances, memorable moments and celeb guests. However, it was Katharine McPhee’s duet with one of the show’s frontrunners that stole the spotlight.

Katharine McPhee is back on the American Idol stage!

was jam packed with big performances, memorable moments and celeb guests.

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.

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

Katharine McPhee has "annoyed" her husband, The "American Idol" alum recently welcomed a son with famed songwriter David Foster, and on Wednesday, she revealed on the "Today" show that they had chosen to name him Rennie. Her the interview with Hoda Kotb and Jenna Bush Hager, McPhee, 36, joked that Foster "probably will kill [her] for saying" the name publicly.

Katharine McPhee, 36, admitted husband David Foster, 71, wasn’t so thrilled she spilled tea on their newborn son’s name! “You know, my husband was kind of annoyed…I’m in trouble, but hopefully my husband won’t be too mad at me!” the American Idolalum revealed on SiriusXM’s The Jess Cagle Show on Thursday, Mar. 18.

 Katharine McPhee  was excited to share the name of her first born child, Rennie David Foster, with the world. Her husband, David Foster, on the other hand, wasn’t as happy with her decision.

Whoops! Katharine McPhee decided to share her 3-week-old son Rennie’s name on Wednesday, March 17 — and husband David Foster was not happy about it.

Katharine McPhee is positively glowing! Three weeks after the American Idolalum, 36, welcomed her first child with husband David Foster, 71, she took to Instagram to share a photo of herself in a green silk dress for St Patrick’s Day. Katharine simply captioned the post with a four leaf clover, as she rocked the long-sleeved satin midi dress, which featured a high slit up one leg. The brunette beauty paired the ‘fit with nude pumps and a matching, green face mask.

Katharine McPhee is opening up about her baby boy. The "American Idol" alum, 36, and her husband David Foster, 71, announced in February that they’d welcomed their first child together.

Spilling the beans! Katharine McPhee joked on Wednesday, March 17, that her husband, David Foster, would “kill” her for sharing their baby boy’s name.