'This is not his thing at all': Gwen Stefani says she had to 'convince' Blake Shelton to participate in being crowned Sexiest Man Alive

Blake Shelton's not just the Sexiest Man Alive, he might also be the luckiest!

That was evident as his lady love, Gwen Stefani, looked gorgeous Tuesday as she appeared on The Tonight Show with Jimmy Fallon.

The Anaheim, California native, 48, wore a number of eye-catching ensembles as she was snapped on the set of the NBC franchise.

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Thankful: Gwen Stefani, 48, beamed on Tuesday as she appeared on The Tonight Show with Jimmy Fallon 

Thankful: Gwen Stefani, 48, beamed on Tuesday as she appeared on The Tonight Show with Jimmy Fallon 

Take your style thigh-high like Gwen wearing Casadei boots

Over-the-knee boots are everywhere at the moment; we’ve spotted countless celebrities donning the style and Gwen Stefani is the latest to tap into the trend.

The singer never puts a foot wrong when it comes to fashion choices and she wowed on The Tonight Show with Jimmy Fallon. Gwen was decked out in an all-black ensemble, consisting of a tulle mini dress, fishnet tights and an incredible pair of patent boots.

From Casadei’s autumn/winter 2017 collection, these stunners feature a razor-sharp heel and pull-on over-the-knee silhouette that is guaranteed to lengthen legs.

Not only does this style of boot look amazing paired with an LBD on a night out, it would look great worn with skinny jeans and a chunky knit during the day. Fancy giving it a go? Take a look at our edit of sexy and stylish boots in the edit below.

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The Hollaback Girl singer wore a black tulle dress with leather thigh-high boots with fishnet stockings. She later took to the stage in a sleeveless black top with a multi-colored tutu over thigh-high red boots.

Stefani's trademark blonde locks were down and parted on the side, and she had a bold red shade of lipstick on.

The Make Me Like You artist opened up on her country superstar boyfriend's crowning by People magazine with the Sexiest Man Alive designation, noting, 'This is not his thing at all, I feel responsible about this.'

She said that the 41-year-old Shelton was initially resistant to the idea, as he's not big on the rigmarole of photo shoots, but she eventually 'had to convince him' to participate in the magazine's lofty crowning. Gwen told Fallon she asked Shelton, 'Why would you not do it? Just live in the moment.'

Queen of hearts: The singer was decked out in a festive ensemble as she performed 

Queen of hearts: The singer was decked out in a festive ensemble as she performed 

Empire state of mind: Gwen has been in NYC to promote her new holiday album as of late

Empire state of mind: Gwen has been in NYC to promote her new holiday album as of late

Passionate: The singer delivered an emotional performance on The Tonight Show stage

Passionate: The singer delivered an emotional performance on The Tonight Show stage

In the appearance, Gwen said Shelton, her boyfriend of two years, is 'really hard to buy' Christmas gifts for - but she settled on a practical solution.

'I think because he doesn’t fit in any of my furniture at my house, he’s too big,' she said, he was going to get a couch this holiday season. 'I’m putting it outside so he can put out fires and stuff like that.'

The mom-of-three - Kingston, 11, Zuma, nine, and Apollo, three, with ex-husband Gavin Rossdale - has been hard at work in the Big Apple promoting her holiday album You Make It Feel Like Christmas. Earlier Tuesday, she was seen pre-taping a performance for the Macy's Thanksgiving Day Parade.

Soaking it in: Stefani beamed as she took in applause from the crowd 

Soaking it in: Stefani beamed as she took in applause from the crowd 

Happy together: Gwen had the perfect response to her boyfriend Blake Shelton's crowning of sexiest man alive by People magazine 

Happy together: Gwen had the perfect response to her boyfriend Blake Shelton's crowning of sexiest man alive by People magazine 

In shape: Gwen showed off her strong shoulder and bicep at a ceremony at the Empire State Building on Monday

In shape: Gwen showed off her strong shoulder and bicep at a ceremony at the Empire State Building on Monday