Toned tummy! Carrie Underwood shows off washboard abs in floral bikini as she launches new swimsuit line

By CAITLIN O'TOOLE AND KATE THOMAS FOR MAILONLINE

PUBLISHED: 06:05, 2 April 2016 | UPDATED: 06:52, 2 April 2016

Carrie Underwood showed off her toned abs as she announced the launch of her new swimsuit line.

The country singer shared a glimpse of her new business venture on Instagram on Friday, posing for a smiling selfie as she modeled one of the brand's floral bikinis.

'I'm so proud to be able to work with @dickssportinggoods to create a line of swimwear that makes me feel so good!' the 33-year-old wrote.

Toned tummy: Country star Carrie Underwood showed off her fit figure as she modeled her new swimwear line on Instagram on Friday

'Adorable and athletic...and covers everything I want covered!'

The country star grins as she shows off her washboard abs in the floral bikini top and matching pink bottoms while standing in a shallow pool.

The new line comes after the fitness enthusiast launched her Calia brand of fitness wear.

The musician has also just extended her popular Storyteller Tour with more fall dates.

Where it all began: Carrie has just extended her Storyteller Tour and will appear on the American Idol grande finale on April 7

And she shared her excitement last week as the tour brought her back to the St Louis stadium where it all began with her Idol audition ten years ago.

'Here for a show tonight in St. Louis - where it all started for me! This is where I auditioned for #AmericanIdol I'm so excited to perform on the series finale on 4/7!!!' she wrote.

Earlier this week, the singer revealed how she's using her star power to help other female country artists.

Superstar: The singer performed during her tour stop in Auburn Hills, Michigan last week

When the Academy of Country Music asked Underwood to headline the first night of their Party for a Cause festival in Las Vegas ahead of their 51st ACM Awards on Sunday, she said she'd do it only if she could pick an all-female lineup.

'Why not just ask women? Why not have a whole night that is just all strong, amazing women kicking butt onstage and entertaining and having fun?' she said.

'I have been at places where they wanted me to play before a guy, just because it was a guy.

'Someone who hasn't necessarily sold as much or done as much or been around as long. And I am like, 'No!' It has nothing to do with ego. It just makes no sense to me.'