Gwen Stefani and Blake Shelton have confirmed they're dating.

Gwen Stefani

Gwen Stefani

The couple, who first sparked romance rumours last month, have officially confirmed they recently decided to take their friendship to the next level after forming a bond on the set of 'The Voice' USA.

A spokesperson for the 'Used to Love You' hitmaker, who split from Gavin Rossdale in August after 13 years of marriage, told UsMagazine.com: "Gwen and Blake are longtime friends who have very recently started dating."

The 46-year-old beauty, who has three sons with her estranged husband, 50, Kingston, nine, Zuma, seven, and Apollo, 20 months, flew to Nashville with her new beau, 39, via private jet on Tuesday (03.11.15) ahead of his performance at the Country Music Awards [CMAs].

The No Doubt star decided not to attend the ceremony itself, but a source confirmed the pair planned to attend a number of after-parties together even though his ex-wife Miranda Lambert, whom he split from in July after four years of marriage, was likely to be present.

The insider also told gossip website TMZ.com: "[Gwen] doesn't care if Miranda's there or not. She just didn't have the right clothes for the award ceremony because it was so last minute."

The duo decided to make their relationship official shortly after Gwen admitted she thought the country music star was "hot" and revealed they had bonded over the recent breakdown of their marriages.

She said: "To be super honest, it is kind of crazy we both went through the same thing at the same time.

"There's been so many people that I've got so much comfort from. Just people coming to me and telling me their story, not confiding, but sharing, which has just helped me see things from a different perspective and move forward."