AceShowbiz - Country superstar Carrie Underwood is marvelling at how quickly time flies after celebrating her eighth wedding anniversary with husband Mike Fisher on Tuesday, July 10.

The Cry Pretty hitmaker took to Instagram to share a sweet snap of the couple enjoying an apparent date night, with a second photo showing the stars puckering up for a kiss.

"Here's to 8 years, babe! Where does the time go?!" Carrie captioned the images. "I love you today more than yesterday... which was more than the day before... and so on and so forth. Here's to many more years together! (Love) you!".

Here’s to 8 years, babe! Where does the time go?! I love you today more than yesterday...which was more than the day before...and so on and so forth. Here’s to many more years together! ❤️ you!

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A post shared by Carrie Underwood (@carrieunderwood) on Jul 10, 2018 at 6:25pm PDT

Carrie tied the knot with the now-retired Canadian ice hockey player in 2010, and they are parents to three-year-old son Isaiah.

The couple frequently shares its love for one another on social media, with Carrie recently honouring Canada's Independence Day on 1 July by posting a picture of herself with Mike, naming him her "favorite Canadian".