Fifth one-day international, Perth:
Australia 213-8 beat Pakistan 212 by two wickets
Pakistan's batsmen struggled to deal with Johnson and McKay
Australia won the final one-dayer with Pakistan to complete a 5-0 series sweep on top of three Test victories out of three against the same opponents.
The cricket itself was overshadowed by an investigation into an alleged ball-tampering incident involving stand-in Pakistani captain Shahid Afridi.
Afridi was caught on camera biting into the ball before tossing it back to the bowler late in the Australia innings.
The ball was replaced with five overs to go and Australia needing 35 to win.
Soon afterwards, a fan jumped the fence to launch a rugby tackle at Pakistani fielder Khalid Latif before being dragged away by security. Latif was unhurt.
Electing to bat first in Perth, Pakistan crashed to 16-3 before Umar Akmal (67) and Fawad Alam (63) improved the situation with two big stands.
Khalid Latif is floored by a flying tackle from a spectator
However, a late collapse left Australia chasing a modest 213 to win.
The hosts lost regular wickets themselves on a day when the bowlers generally enjoyed themselves, but Michael Hussey produced an unbeaten 40 amid all the late chaos to see them home with four balls left.
Despite having to cope with injury setbacks, the hosts' seam bowlers enjoyed a fine series - and on Sunday Clint McKay (4-35), Ryan Harris (3-44) and Mitchell Johnson (2-42) were the main enforcers.
Iqbal Qasim, the Pakistan chief selector, has reportedly sent in his resignation to the Pakistan Cricket Board in the wake of the team's dismal performance in Australia.
They played well in Sydney in the second Test of three only to suffer a batting collapse when poised for victory.