The singer-songwriter swapped his usual slick style for a cheery reindeer knit while performing at the Disney Parks Christmas Day Parade TV special on Saturday (7 December).
It looks like Nathan was the only member of the band to go down the Christmas jumper route as Max George, Jay McGuiness, Tom Parker and Siva Kaneswaran kept to their usual style... but the group's band standing behind them certainly made the most of the festive concert!
The Disney Parks Christmas Day Parade airs on Christmas Day (obvs!) in the US and features a lineup of stars performing around the Magical Kingdom at the Florida theme park and a parade of Disney's most famous characters.
Nathan certainly seemed to be having a great time taping the special, later tweeting a photo from the performance with the caption: "Possibly my favourite picture I have ever been part of."
The Wanted are over in the States right now promoting their new album Word Of Mouth and performing across the country. It hasn't been all work and no play for Nathan though, as he found time to support pop star girlfriend Ariana Grande at the 106.1 KISS FM's Jingle Ball in Dallas earlier this month.
And with Christmas approaching, hopefully Ariana has had a word or two about what she wants to find under the Christmas tree, as Nathan recently admitted he's not the best at gift buying.
He told We Love Pop magazine: "I'm really bad at buying presents and I do it all at the last minute, so it's really stressful. Also, I am such a copy out with gifts. I bought my sister driving lessons – that's so boring isn't it?"
We don't like to use the word boring, Practical, maybe.