By Mark Buckingham
Last Updated: 01/01/70 1:00am
The Bhoys were stunned at Easter Road last week when Hibs ran out 2-1 victors but a devastating second half spell at Parkhead ensured Martin O'Neill's men have won all bar one of their league fixtures this season.
Parity lasted just four minutes in Glasgow as Chris Sutton opened the scoring after finishing smartly from John Hartson's pass.
Hartson then missed from close range while at the opposite end, Derek Riordan had an effort tipped over by Robert Douglas.
But the contest turned on 42 minutes when Riordan was shown a straight red card for a professional foul on Jackie McNamara.
Celtic quickly took advantage by doubling their lead on the stroke of half time when Hartson headed home Alan Thompson's cross.
After the break, the hosts ran riot with Sutton making it three from the penalty spot after Henrik Larsson was fouled by Colin Murdock.
Larsson was the provider again on the hour mark when the Swede's pass picked out Hartson for the Welshman to finish confidently.
Larsson got on the scoresheet on 66 minutes after being teed up by Liam Miller and the same player provided Stilian Petrov with the sixth goal on 77 minutes.
Celtic had a glut of other chances to take their score into double figures but the 6-0 scoreline was ample revenge for their cup reverse.
Hearts failed to seriously boost their Uefa Cup prospects after being held to a 0-0 draw at home by Motherwell.
Craig Levein's troops could not break down the visitors' stubborn resistance in a game of few chances although Well boss Terry Butcher will be satisfied with the stalemate as it ends his club's run of four successive defeats.
Dundee United secured a crucial victory at Kilmarnock with goals from Billy Dodds and Jim McIntyre making the difference.
Dodds broke the deadlock on 20 minutes when he converted Barry Robson's cross while McIntyre netted from the spot on 81 minutes after Jason Scotland was brought down by Steve Fulton.
Aberdeen were denied a much-needed three points by a last-gasp equaliser at Livingston.
Scott Booth's finish from Scott Muirhead's pass on 23 minutes appeared to be enough for Aberdeen to claim victory but Livi replied in injury time.
Fernando Pasquinelli's header was well saved by David Preece but Burton O'Brien was on hand to tuck home the rebound.
Gerry Britton and Derek Whyte gained their first triumph since being appointed managers on a permanent basis with a crushing 4-1 success over Dunfermline.
Andy Thomson's 38th minute opener gave Partick the platform for victory before The Pars were reduced to ten men on 56 minutes.
Scott Thomson's foul on Jamie Mitchell resulted in a red card and penalty, which was slotted home by James Grady.
Craig Brewster pulled one back for the visitors but late goals from Andy Ross and Grady put a gloss on the scoreline.