From the moment they stepped on stage with their massive party anthem Let’s Get It Started, until they left with I Gotta Feeling, the Black Eyed Peas had about 25,000 fans on the Halifax Common in an absolute frenzy.

The six-time Grammy Award winning artists and No. 1 hit-makers came as advertised on Saturday night as headliners for Halifax Rocks 2010. The group featuring will.i.am, Fergie, apl.de.ap and Taboo delivered their bass-pumping hits that shook the foundation of the city greenspace.

The stage show featured back-up dancers dressed in robotic-like costumes, a laser light-show and large screens offering various cool visuals.

“We don’t know when we’ll be back here, so let’s party,” will.i.am told the crowd.

The jacked-up audience happily obliged, boppin’ to the beat of every hit song.

Prior to taking the stage, the Black Eyed Peas looked on as Weezer performed a lively 50-minute set.

Several members of Weezer joined the Peas on stage when it was time for them to close the show. During I Gotta Feeling, Fergie gave the mic to Weezer frontman Rivers Cuomo who belted out lines from the chorus.