What's the best time to take a public dig at your ex? When they're stuck in a house with no form of contact with the outside world, of course.
And that's exactly what Jordan Davies has done while his former flame, Megan McKenna, is in the Celebrity Big Brother house.
Jordan – who has also appeared on Ibiza Weekender – hooked up with Megan, 23, on series three of Ex On The Beach, with the couple romping on TV after just two weeks.
The pair then returned to series four of the* MTV* show, but emerged from the island as singletons.
Talking to The Sun on Sunday, the 23-year-old said that his ex was "acting like a slag for the cameras" before claiming: "She's a nasty piece of work who totally deceived me.
"All she cared about was her career and being famous."
However, Megan's spokesperson called the claims "malicious lies" and accused Jordan of attention seeking.
CBB January 2016 official line-up
Gemma Collins
FUN FACT: Gemma once lost three stone in a month by JUST DRINKING JUICE. She must've been absolutely hank marvin.
Scotty T
FUN FACT: Geordie Shore's Scotty once got catfished so hard he drove three hours out of his way only to meet a 47-year-old man called Peter. ROFFLE.
Danniella Westbrook
FUN FACT: Danni's been touted for CBB for as long as we can remember, most recently last year after she admitted she needed a roof over her head because she'd been made homeless. Crikey.
Christopher Maloney
FUN FACT: The ex-X Factor star underwent £60,000 worth of plastic surgery in 2015 after getting sick of Mr Potato Head comparisons. 60,000. Of the Queen's English pounds.
Stephanie Davis
FUN FACT: Stephanie was 'let go' from her Hollyoaks contract in July 2015 following claims she'd been drinking on set. However, she's always denied the rumours - maybe CBB will be where she sets the record straight.
David Gest
FUN FACT: The ex-husband of Liza Minelli is reportedly trousering a sweet $1 million for this CBB stint. Spend it wisely, eh Dave? Maybe invest in some non-magician clothes.
Kristina Rihanoff
FUN FACT: Poor Kristina was given a rough ride by Twitter trolls after the breakdown of her relationship with Joe Calzaghe.
Darren Day
FUN FACT: Ol' Dazza once dated actual Isla Fisher. ISLA FISHER. WE KNOW.
Nancy Dell'Olio
FUN FACT: Nancy's not just the ex-girlfriend of Sven Goran-Eriksson - she's also a super-smart lawyer lady. Well, she was before all the reality shows.
Jonathan Cheban
FUN FACT: Before Kim Kardashian was even a twinkle in Ray J's eye, her now-BFF Jonathan was hanging out with the likes of Posh Spice.
Tiffany Pollard
Jeremy McConnell
Angie Bowie
John Partridge
Megan McKenna
FUN FACT: Back before the Ex On The Beach saga, Megs actually auditioned for Britain's Got Talent in 2009. And wore a tutu. And it was mega-awkward.
Winston McKenzie
FUN FACT: The former UKIP spokesperson dramatically quit the party after claiming he was facing, er, racial discrimination.