Barcelona were comfortably dismantled by a PSG side who put La Remontada behind them with an inspired performance from hat-trick hero Kylian Mbappe.
The home side actually went ahead on 27 minutes through a Lionel Messi penalty, won when Layvin Kurzawa was penalised for fouling Frenkie de Jong with the slightest clip of the legs.
Messi executed his effort perfectly, but the same cannot be said for those around him, who offered progressively less resistance to the visitors as the match continued.
PSG were soon level when Mbappe dodged Clement Lenglet before firing past Marc-Andre ter Stegen.
It was all square at half time but on 65 minutes, Mbappe doubled his own and his team's tally when he added another, picking up a poor Gerard Pique clearance to convert.
Ronald Koeman could do little to turn around his side, and Moise Kean headed past Ter Stegen five minutes later, with the German 'keeper failing to keep out a relatively tame effort.
With only minutes remaining Mbappe completed his hat-trick with a stunning curling effort, to wrap up victory.
PSG will keep their 2017 nightmare in the back of their minds, but this looks like a side transformed. Unfortunately for Barcelona, the same can be said for them.