The singer helped spread some holiday cheer when he celebrated Christmas Eve eve (23 December) with pals in London.
As usual, the 30-year-old Essex lad showed his cheeky side by wearing a tongue-in-cheek grey jumper, with the slogan 'What The Elf?' on it.
Posting a selfie in the back of a people-carrier en route to their drinking den of choice, Olly wrote: "What the elf?! #XmasEveEve."
He had previously told his Twitter followers: "HAPPY XMAS EVE-EVE everyone! Tonight is the annual lads night out! Will be seriously messy.. Get them Xmas jumpers & drinking hats on lads."
The Band Aid 30 singer enjoyed a night at Bounce Ping Pong in Holborn, a bar combining ping pong and alcohol - sounds potentially lethal!
And Olly had lots to celebrate after an amazing week.
The former X Factor star - who was runner-up to Joe McElderry in 2009 - not only reached six million followers on Twitter, his album also went platinum. Good going, Olly!
Unable to contain his excitement, Olly tweeted: "6 MILLION-ARRRRRNNNN followers!! Thanks for following me!! Not sure I'm the most interesting haha but love that you do! Xmas eve-eve drinks."
He also said: "Masssssssive thanks to everyone! Officially today my album #neverbeenbetter has gone PLATINUM!! Am buzzing big thanks."
After toasting his success with his pals, Olly felt a little worse for wear when he woke up on Christmas Eve.
Hungover, he tweeted: "@bouncepingpong what a ledge night ing pong was crazyyyyyyyyy#XmasEveEve.
"Feeling like [poo] right now!!"
Merry Christmas Olly!
Are you a fan of Olly Murs? Tell us in the comment box below and you could win £50!
Reveal is now on Google Plus! Join us here for the latest pictures, fashion and celebrity news!