It might just be the greatest karaoke band of all time.

Gary Barlow, Rod Stewart, Ronnie Wood, Geri Horner and Emma Bunton formed a ‘supergroup’ as they gathered around the piano for a sing-along at Christian Horner’s surprise birthday party on Wednesday night.

Between them, the superstars have recorded 51 number-one hit singles and sold over half a billion records worldwide.

Mr Horner wrote on Instagram: “Last night my lovely wife @gerihalliwellhorner completely surprised me with a totally unexpected dinner with some lovely friends. Looks like we’re forming a band.”