Cheryl and Jean-Bernard, or JB as he is known for short, were said to be holidaying in the Caribbean recently when they almost came face-to-face with the beast.
The couple were apparently enjoying a spot of snorkelling together when they saw the black tip shark ahead of them, prompting them to swim as fast as they could to the shore.
Although this particular breed has not been known to kill swimmers, Cheryl and JB were apparently left quite shaken by the incident.
According to The Mirror, JB later told friends on his private Instagram account: "Ever heard a Geordie scream, 'It's a f***ing shark?'"
A source added: "It was a very scary experience for them both."
Former Girls Aloud singer Cheryl has been keeping a very low profile since the last series of The X Factor wrapped in December - and her silence had even sparked pregnancy rumours among fans!
On Friday, however, Cheryl shared her first Instagram selfie of 2015 before heading back home to Newcastle to launch her latest charity project, Cheryl's Trust, which will help disadvantaged young people living in the north east of England.
She tweeted: "I'm happy to announce my exciting news. I will be delivering my first...centre in Newcastle for #CherylsTrust."
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