O2 in the Park, Ireland's biggest free outdoor concert is underway in Dublin's Phoenix Park.

100,000 revellers snapped up the tickets for the RTÉ 2FM sponsored event. The good weather helped to ensure a great atmosphere.

In total 31 acts performed and the line-up included home-grown as well as international talent. Highlights included Charlotte Church showcasing her new sound, Brit Award winner Lemar and an appearance from Lee Ryan from Blue.

Following their performance Irish boy band Zoo noted the crowd is "beserk".  Before heading out to give his performance, singer Tabby commented

It’s just a massive crowd out there man, I took a look out over the fence and I’m a bit frightened to be honest.

Headline act The Sawdoctors currently touring in Germany, drove hundreds of miles to catch an early morning flight so they could deliver another show-stopping performance.

An RTÉ News report by Jonathan Clynch broadcast on 27 August 2005.