Katharine McPhee, 38, displays her toned midriff in black crop top on luxury trip to Capri with husband David Foster, 72, and their 16-month-old baby boy

Katharine McPhee looked radiant as ever as she enjoyed a boat trip with her husband David Foster in Capri, Italy on Monday. 

The singer, 38, showcased her incredible figure as she donned a black crop top and matching leggings. 

Displaying her washboard abs in the outfit, the former American Idol star styled her brunette locks into a ponytail.

Going makeup free on the outing, Katharine added to her casual look with a pair of gold necklaces.

Record producer David also opted for a laid back look as he sported a white T-shirt along with beige shorts. 

The couple are enjoying a luxury European vacation with their son Rennie, 16 months, and friends. 

The star also took to her Instagram Stories as she panned over a gorgeous, golden yellow Prada shift dress.

She posed along with loved ones on a boat as she flaunted her outfit, teamed with stylish golden sliders layered necklaces for a glam touch. 

Another sweet snap on her Story saw an adorable little baby - understood to be Rennie - being carried on the shoulders of a pal. 

David and Katharine became engaged in June 2018 and married the following year in Kensington. 

Their son was born on February 21, 2021.  

In addition to Rennie, David is a dad to Jordan, 35, Sara, 41, Erin, 38, Amy S., 48, and Allison, 52.

On her Instagram, Katharine recently shared a sweet tribute to her spouse, in which she gushed about their love.

'Happy Father’s to the man @davidfoster who loves me like I could have only dreamed of & who made me complete in life by making me a mommy. I love our little family,' she captioned the slideshow.

The mother-of-one continued: 'I love our big family. You have NEVER complained over how your life is slightly different now. 

'Well… you only complain that you can’t stay up late watching TV in bed but how can I blame you -that’s your favorite thing.'

'You’ve only made bringing Rennie into the world an absolute joy for me. To many more adventures baby!' the star concluded. 'I love you to the moon and back.'

On her Instagram Story, the singer shared a photo of her in the delivery room as her man held her hand.

'I love this pic,' she gushed. 'You were the best labor partner... I'll never forget seeing you eat that hospital cheese burger during some intense contractions.'