Largest gathering of people wearing vests/singlets/tank tops

According to Official Guinness Records,

The largest gathering of people wearing singlets was 3,500 people gathered in the Bull Ride Arena during the annual Deniliquin Ute Muster in Deniliquin, NSW, Australia, on 2 October 2010. The participants were wearing blue singlets, known across Australia as ‘Blueys’, traditionally worn by shearers.

For a complete list of 2010 records, please visit 2010 Guinness Records in Australia.

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