As McFly's latest album is called Memory Lane: The Best of McFly, we decided to take the boys down memory lane and see how much they could remember about their past!
What did Dougie wipe on the camera when they were on former CBBC show TMi in 2006? In which unusual place was one of their songs played in 2009?
And which prize did Harry beat Prince Harry and Peter Andre to last year?
Watch the interview to see how well they did in our special quiz!
Oh how time McFlies by...