The former reality TV star won Big Brother in 2010 and is now one of Holly Willoughby's regular stand-ins to host ITV daytime show This Morning, but said she was all too aware that her fame could be over in a flash.
She told The Sun: "It was only a few years ago that my nan suggested I apply for a job at Lidl because they are good payers.
"I think something has always had my back, I don’t know what it is. I suppose I’m quite religious.
"Then again, you don’t know what’s around the corner - it could be here today and gone tomorrow, so you’ve got to enjoy it."
Gibson, 36, often presents segments for This Morning but was called in to cover for Willoughby as a main host in November when she was off with a stomach bug.
She proved such a hit with viewers, who enjoyed her sense of humour and haphazard style of presenting, that many called for her to get a more regular schedule on screen.
Gibson has since joined Vernon Kay as host over the Christmas period and filled in for good friend Alison Hammond this week on her Friday slot on the show alongside Dermot O'Leary.
Despite her grandma's career advice, Gibson said that her family were her biggest supporters.
The TV star is known for her chaotic moments on screen as she presents This Morning's competition segments, with one memorable moment last year seeing her fall into a lake.
She had been attempting an assault course of water inflatables when she slipped into the lake and had to be hauled back out of the water by her bottom in a Bridget Jones-style scene.
Watch: Barry Humphries mistakenly congratulates Dermot O'Leary for 'bravely' coming out