The singer has revealed that he regards showering naked with Will Ferrell as his favourite memory since coming second on 'The X Factor' in 2009.
He told BANGShowbiz: "I met Will when we were doing Soccer Aid and I actually had a shower with him naked.
"It’s one of the highlights of my career, that I had a shower with Will Ferrell, it was a beautiful thing."
In fact such is Olly's love for Will that he dressed up as his 'Anchorman' character Ron Burgundy at the premiere of 'Anchorman 2' earlier this week.
The film's cast, Steve Carell, Paul Rudd, Christina Applegate, David Koechner, Meagan Good and James Marsden all also walked the red carpet in London's Leicester Square.
Take a look at all the pics from the event below...