Hair-band on the bun! Shirtless Paul McCartney, 78, tries out a trendy manbun as he and wife Nancy Shevell, 61, relax on festive getaway to St. Barts 

Sir Paul McCartney was certainly in holiday mode as he tried out a trendy new man bun while sunning himself on the beach in St. Barts on Tuesday. 

The Beatles legend, 78, rocked his funky 'do as he cosied up to glamorous wife Nancy Shevell, 61, while enjoying his annual Caribbean winter getaway.  

The musician defied his septuagenarian status as he showcased the kooky new hairstyle, while Nancy looked elegant in a pale pink cover-up. 

Sir Paul and the rest of The Beatles were known for their hairdos back in their Sixties heyday, and the star has always kept his locks lengthy. 

In a practical move, the star kept his hair off his face with the nifty man bun as it caught the Caribbean breeze. 

Sir Paul went shirtless to catch some rays while his wife Nancy looked stunning in a her straw hat and billowing cover-up. 

In 2018, Paul hit headlines when he ditched the hairdye and allowed his natural grey hair to come through as opposed to his coloured auburn look.

Away from his holiday, Paul released a new album McCartney III this week, having written and recorded it during lockdown earlier this year.

And in a BBC chat with actor Idris Elba, aired last Saturday night, the crooner admitted he 'didn't realise' what he was creating when he did it.

He said: '[In] lockdown everyone cleaned out their cupboards and did all the stuff they'd been meaning to get around to. So [making an album] was my equivalent.

'I wasn't trying to make an album. So I had these 10 songs, I thought, What am I going to do with these? It was just the 10 as I didn't know I was making an album.' 

Paul went on to explain why he named his album McCartney III: 'I realised, because I played them myself, I'd done McCartney I and McCartney II in the same vein, that this would be McCartney III. So then it was like, ok, I see what I'm doing now.'

In lockdown, Paul stayed in the countryside with his daughter Mary and her kids.

Of the experience, he went on: 'I was really lucky. I was locked down with my daughter Mary and her family, and then I was able to go to the studio to work, it was a very safe place. We were distanced, we were always being very careful.

'I was on holiday in the beginning of the year and then lockdown hit, covid hit, so I came back and I was locked down in the country.

'[It] was good as it meant I was hanging out with four of my grand-kids so suddenly that was great.

'I was able to go in the studio. The government said you can go to work only if you can't work at home. So I don't have a home studio, my home studio is 20 minutes away.

'So then I just started thinking, what about that song I had a few months ago that I never finished. So we pulled that out and I'd work on that'.