Socceroos midfielder Tom Rogic has scored his first club goal in more than four months to help Celtic beat nine-man Aderdeen 3-0 and reach the Scottish Cup final, with the Hoops still on course for a third straight domestic treble.
Rogic, who had not scored since Celtic's 5-0 thrashing of Dundee in October, added the final goal in the 69th minute of the semi-final at Hampden Park.
Already the Scottish League Cup champions, Celtic need just two more wins to seal an eighth straight Scottish Premiership title.
Hoops interim boss Neil Lennon will now look to boost his chances of landing the post permanently by wrapping up the club's third straight domestic clean sweep when they take on Scottish Cup final opponents Hearts at Hampden Park on May 25.
Lennon's record at Hampden with Celtic was mixed after notching up six wins and five defeats from his previous 11 visits during his first stint in charge of the Hoops.
But an upset never looked likely this time as Celtic started like they meant business.
Indeed, Aberdeen had already lost Dominic Ball to a second yellow card when Celtic went ahead through James Forrest in first-half stoppage time.
Odsonne Edouard then converted a penalty in the 61st minute to make it 2-0 .
Aberdeen's day went from bad to worse six minutes later when Ferguson was shown a straight red for diving into Rogic with a disgraceful two-footed lunge.
The Australian took his revenge in the only way he knows how as he bounced up to fire home Celtic's third off the rebound of the resulting free-kick.
Lustig fired into the wall but the ball bounced straight to Rogic who calmly took a touch before sending a sweet finish into the bottom corner.
Derek McInnes had been looking to lead Aberdeen into his fifth cup final as manager, but both he and his assistant manager, Tony Docherty, finished the game watching from the stands after they also lost their discipline on the touchline.