People are hailing this as the 'best ever' best man's speech
When it comes to weddings, the part everyone's really waiting for is the best man's speech.
Of course watching the vows and having a fancy meal together is very nice, but everybody attending already knows exactly what's going to happen there.
The best man's speech is where a bit of excitement comes in, the chance for things to go a bit off-script and treat the guests to a few funny but embarrassing anecdotes about the groom before normal service resumes.
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Nailing the speech is a tricky task as the best man's got to be funny without getting too mean about it.
Too mild and you'll get the dreaded polite round of applause instead of laughter, go too far and the rest of the top table will be glaring in your direction for the rest of the night.
One bloke found the perfect mix by deciding to crack out the guitar and sing his speech, managing to get the entire room clapping along to the beat by the end.
The general theme of the song centred on how his family used to think younger brother Rob was gay, though his brother and new wife Jen were 'made for each other in every way'.
The clip went viral online and people watching the whole song thought it was a 'brilliant' best man's speech, with one person calling it 'the most amazing best man's speech' they'd ever seen and another calling it their 'favourite' of all time.
Someone else said the song was 'going to take a lot to beat' when it came to the greatest best man's speech of all time.
Others wondered if they could book the best man for their own weddings and have him do a song for them.
There are a few other contenders for 'best ever best man's speech', including one where best man Derek recounted the time his family caught his brother Gary enjoying a very special Christmas with new wife Kirsty.
That one left guests howling with laughter and the new bride and groom absolutely stunned at the story.
Getting a really good joke in the speech helps, with best man Todd joking about seeing the bride when they were at school together and thinking 'one day she's gonna have my last name'.
It's really important to make sure all of your audience is laughing along, which one best man forgot to do at his friend's second wedding where he opened his speech with 'welcome back everyone'.
While everyone else loved the opening joke, the bride and groom didn't see the funny side.
Joe Harker