The launch was scheduled for the Harare International Conference Centre (HICC).
“Ammartia, I know how much you were looking forward to this, but your health and safety have to come first for me,” said Brown.
“True love is selfless, and I do love you. Let’s stay as safe as possible; be mindful and protect our nation.
The government recently banned public gatherings in the capital due to the cholera outbreak which has so far claimed 32 lives with more than 7,000 cases recorded countrywide.
Ammara said the tour has been moved to next month with Malawi the first stop on October 26.
She will be backed by Mr Eazi, Tammy Moyo, Takura and EXQ.