Festival managing director Sebastian Flynn said this year's event may equal record numbers after a 12,600 turnout on Friday and just over 14,000 on Saturday.

''We're hoping for 55,000 - if we can tip that, that would be wonderful,'' he said.

Melbourne circus act the Tiny Giants attracted a small crowd on Sunday afternoon, showing off their juggling and acrobatics in one of three shows of the day.

Performer Ollie Versteegen said he first tried circus as an elective in year 10 at school, joined a youth circus and went on to study the art form after graduating but was still new to street-style performance.

''I'm getting used to having a microphone on my face and we're getting used to how audiences react to anything and everything,'' he said.

Versteegen said people were surprised when he told them he was a circus performer and he sometimes showed them a video to illustrate exactly what his job involved.

''I love the attention,'' he said. ''I love being able to have an audience engage and clap and cheer for something we've worked really hard to do.

''It's fun having put five years into a certain set of skills and then getting to put that on stage.''

Jodie Miller, a solicitor from Sutherland, New South Wales, was spending the weekend camping with friends on the festival grounds and said that Melbourne band the Woohoo Revue had been her favourite act so far.

''We came for a day last year and we just felt like there was so much to see and do that we just had to come back,'' she said.

Mr Flynn said the festival highlighted music from one Australian state or territory each year and, in its centenary year, it was the ACT's time to shine.

Popular Canberra band Fun Machine and local act Julia and the Deep Sea Sirens have appeared at the festival over the weekend.

The festival continues on Monday.