At Saturday night's Brit Awards ceremony, comedian and show presenter Gilligan made a blunder by mixing up performers Sam Smith and Lewis Capaldi, both scheduled to perform on stage.
He introduced Capaldi's appearance by saying: "Lets have another performance, it's a singer-songwriter who is the spirit of the Brit Awards in human form.
"Here with his amazing number one single, Forget Me.
"It's the brilliant...go crazy...it's Sam Capaldi."
Although some viewers shared annoyance on Capaldi's behalf that Gilligan had got his name wrong, the Scottish singer showed he could see the funny side by tweeting a mocked up photo of himself in Smith's unusual Brits outfit.
Earlier in the evening, Smith had graced the red carpet in a black latex suit with inflated shoulders, hips and legs, and Capaldi poked fun at the name blunder by photoshopping his head onto a photo of Smith in the outfit.
He tweeted it during the ceremony, captioned: "Sam capaldi x."
The singer's fans found the joke hilarious, including footballer Peter Crouch who had been seen guest judging The Masked Singer alongside Gilligan earlier in the evening.
Crouch commented on Capaldi's post: "This man is a hero."
Footballer Ben Tollitt agreed, writing: "National treasure this guy."
Capaldi's sense of humour went down well with plenty of others, too, as one person tweeted: "Oh my God this wins the Internet! Hands down!"
Someone else wrote: "Quite honestly the best thing I've seen all week!"
Another person added: "Aaaahahahahaha You’re the best Lewis!!!"
Following Capaldi's performance at the Brits, Gilligan said: "I have to apologise, I did call him Sam. It just goes to show how strong the drinks are at the brit awards, they are not playing around."
Later in the ceremony, Gilligan announced that technical issues were postponing a performance from David Guetta with Becky Hill, Ella Henderson and Sam Ryder, and showed viewers a recording of Adele singing at last year's awards while the problem was fixed.