Celtic hit St Mirren for 5 in a thrashing at St Mirren Park, keeping Neil Lennon's men top of the SPL.
Celtic warmed up for a trip to the Camp Nou by thrashing St Mirren 5-0 in Paisley.
Goals from Gary Hooper and Efe Ambrose, then Victor Wanyama's double, gave an under-strength Hoops side an unassailable interval lead against sorry-looking Saints.
Tony Watt scored with four minutes remaining to seal a commanding victory, which manager Neil Lennon would have wanted ahead of their Champions League Group G clash with Barcelona on Tuesday night.
