Lionel Messi's 83rd and 84th goals of the calendar year helped the Catalan club trounce Athletic Bilbao at the Nou Camp.
Two goals in three minutes - from Gerard Pique and a deflected Messi effort - midway through the opening 45 minutes put Barca firmly in the ascendancy and Adriano added a superb third in first-half stoppage time.
Cesc Fabregas notched a neat fourth soon after the break and, after Ibai Gomez had pulled a goal back with Athletic's first noteworthy attack of the match, Messi rounded things off with a brilliant fifth goal.
Messi's brace left the 25-year-old needing just one more goal to equal Gerd Muller's record of 85 in a calendar year, set in 1972.
The emphatic win consolidated top spot in La Liga for Tito Vilanova's team, whose only dropped points in 14 games this term came in the 2-2 draw against Real Madrid in October - making their start the best ever to a top-flight season in Spain.