Engie Stadium, Sydney; then Perth and Melbourne

Dual headliners capped a R&B festival with fever-dream energy, including self-help sermons and Pitbull cosplayers everywhere you looked

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Mariah Carey serenades Sydney for the first time in 11 years, and we greet her with a sea of bald caps and business blazers.

Here she is, singing Hero – crystalline, mind you – to thousands of Pitbull cosplayers, who have just sweated off their drawn-on goatees during the rapper’s high-octane set of hedonistic 2010s EDM, and are now swaying along to Carey’s ballad.