Tony Watt made the most of his first Celtic start by bagging two goals and possible forcing his way into his manager’s thoughts for Wednesday’s Champions League play-off second leg.
The 18-year-old doubled the Hopps’ lead after Victor Wanyama’s header had put them in front after three minutes.
Terry Butcher’s defence struggled to cope with the movement of Watt and Gary Hooper all afternoon.
Charlie Mulgrew made it 3-0 after a well-worked free-kick with Watt grabbing his second just after the hour mark.
Two late goals from Ross Draper couldn’t take the shine off the result as Celtic began to turn their attention back to European matters.