Eagle-eyed viewers had spotted the fact Dec's wedding ring finger was empty, less than a year after he wed his agent, Ali Astall, in his Newcastle home city.
But rather than anything dramatic happening, it seems Dec just forgot to pop the jewellery back on before the live show!
He told Daily Star he'd left it in his dressing room by mistake, adding: "I honestly didn't think anyone would even notice – it's only a tiny thing. But there are no dramas at all, thank God, there's nothing more sinister to it than just a mistake."
Dec and Ali married in August 2015.
Next up for Dec and TV presenting partner Ant McPartlin is the BRIT Awards, which take place on Wednesday night on ITV. Acts performing include Rihanna, Justin Bieber, Little Mix and Adele.
For exclusive competitions and amazing prizes visit Reveal's Facebook page NOW!