Scottish rocker Rod Stewart has a penchant for playing rude pranks, according to British boyband McFly.
Stewart once offered the pop group a trip on his private jet, flying from Dublin, Ireland to London.
And the boyband were shocked to discover that the star had drawn X-rated doodles all over their passports.
Singer Danny Jones says, "Rod told us he needed our passports and collected them - then he drew rude things on our photos."
And the band were left red-faced at the airport after realising the scribbles were permanent.
Tom Fletcher adds, "We had to send off for new passports."