The Grammy Award-winner was announced as the headline act for the "race that stops a nation" earlier this month and was due to sing two songs from her latest hit album "Lover".

But it sparked a backlash on social media and a push by the Campaign for the Protection of Racehorses, which claimed she had "put money before compassion" and was "endorsing animal abuse".

More than 6,500 people signed an online petition urging her to cancel.

In a statement late Saturday, promoter Mushroom Events cited scheduling issues as the reason for Swift's no-show.

"Changes to her Asian promo schedule have made it logistically impossible for her to be here," it said. 

Read also: Taylor Swift says will re-record songs to regain control of catalog

The Campaign for the Protection of Racehorses applauded the decision.

"The pressure on Taylor Swift to cancel her performance was significant," it said on Facebook. 

"Her fans did not want to see her supporting animal abuse. Whilst the reason being used by the racing industry is a scheduling mix-up, it appears to us that she has responded to those calls."

Six horses have died at the Melbourne Cup since 2013, including one last year when Irish five-year-old The CliffsofMoher was euthanized after suffering a fractured right shoulder during a race that has been run on the first Tuesday of November since 1876.

"Obviously, this (Swift pulling out) is disappointing for everyone," said Victoria Racing Club chief executive Neil Wilson. 

"We understand how important the pre-Cup entertainment is and we look forward to providing an update (on other acts) shortly."

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