Carrie Underwood looks fabulous at 40 in teeny bikini while on

Carrie Underwood took to Instagram to show off her bikini body on Sunday. The Before He Cheats songstress threw a peace sign as she lounged on an outdoor sun-bed in the shade.

Carrie Underwood shows off incredible abs in green bikini

Play On: Underwood, Carrie, Multi-Artistes: : Music

Karlie Kloss and Rosalia look chic in Chanel at bash celebrating brand's No. 5 perfume at Art Basel

Pamela Anderson stuns in a semi-sheer halterneck gown with a huge feathered hat for Jacquemus show

Chic shift: Leggy Amanda Seyfried displays her very slim pins in a Sixties-style black and gold mini dress

EXCLUSIVE: Turn that frown upside down! Forlorn Heather Locklear looks lost in thought as she sits

EXCLUSIVE: Turn that frown upside down! Forlorn Heather Locklear looks lost in thought as she sits on a curb waiting for fiancé Chris Heisser - but she lights up when he shows

Brynne Edelstein hangs out with The Bachelorette's Carlos and Todd at fundraiser

Carrie Underwood shows off impressive abs and toned legs in a bikini – The US Sun

Carrie Underwood's Green Bikini: Photos – Hollywood Life

That's one way to promote your solo album Nicole! Scherzinger strips down to leather bikini for Killer Love photoshoot