The 'Before He Cheats' singer flashed a smile for the cameras as she left her hotel on Wednesday morning (23 September) and headed to BBC Radio 2, looking beautiful in skinny grey jeans, a black jumper and brown leather boots.
Carrie was in London to perform at the Apple Music Festival at London's Roundhouse on 21 September, making her the first country artist to ever headline the annual event.
The 32-year-old won the fourth series of American Idol in 2005 and went on to become one of the best-selling country music artists in the US and the biggest Idol earner of all time.
She's won a slew of awards including seven Grammys.
Carrie's fifth studio album is called Storyteller, which features lead single 'Smoke Break'. It's been in the making since 2013 and will be released in October.
Her set at the Apple Music Festival wowed fans who took to Twitter afterwards to praise the star:
I've never listened to any of Carrie Underwood's music but I'm watching her Apple Music Festival set and ITS AMAZING— Jack (@theswiftcats) September 21, 2015