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O'Callaghan: Fans like Aviva on crack

IRELAND second-row Donncha O'Callaghan has described the hordes of supporters following Ireland across New Zealand as the "Aviva Stadium on crack".

It is estimated that 25,000 Irish fans are tracking 'everyone's favourite second team', as Brian O'Driscoll's side have been dubbed in the local media.

They easily outnumber any other travelling contingent, though their ranks have been swelled by swarms of Kiwis who have leapt on board the green bandwagon to enjoy the carnival atmosphere.

The support has lifted the team during their march into the quarter-finals and O'Callaghan admits the squad are feeding off their army of followers.

"The fans have been incredible. Maybe that's because the kick-offs are in the evening," he said. "You know the type of crowd we're attracting -- they're probably after a few pints. It's an unbelievable atmosphere ... it's like the Aviva Stadium on crack!

"I can't believe how much it's snowballed. Eden Park was incredible, but I couldn't believe Dunedin."