Carrie Underwood showcases her phenomenal figure and gym-honed abs in chic black and white bikini

Carrie Underwood is proving once again she’s her own best advert, as she modeled her apparel line CALIA on Saturday.  

The 37-year-old old country music superstar took to her Instagram to share a phenomenal mirror selfie of herself in a sporty bikini, which showcased her gym-honed abs. 

‘First day of summer!’ the seven-time Grammy winner captioned the sultry snap inside her massive walk-in closet.

As she slipped into a modest black and white swimsuit, the Before He Cheats hitmaker posed up a storm with one hand on her hip and her gorgeous gams on full display.  

In addition to showcasing her toned and tanned physique, the mother-of-two styled her signature blonde tresses in natural waves. 

Carrie’s post comes after her trainer, Eve Overland, revealed to Us Weekly late last month in the week that she will even workout while doing laundry. 

‘She is dedicated to living as healthy as possible the for 52 weeks of the year,’ Eve said.

‘Carrie has been known to do walking lunges around the house and jog in place while doing laundry.’

Eve also shared that the Cry Pretty singer’s favorite workout is running.  

‘When she hops on the treadmill or takes a jog outside in the sunshine, it dials in her mind,’ said Eve, adding, that it gets her ‘pumped up for the day.’

Carrie is the mom to sons, Isaiah, five, and Jacob, one.

She shares her young kids with her former professional ice hockey player husband, Mike Fisher.

In April she shared an adorable snap of her husband lying on the ground as he bench pressed their sons above him, one of in each hand. 

They met backstage at one of her concerts in 2008 and got engaged the following year.

The lovebirds married in July 2010 in Georgia with guests of over 250 people.