The Lollapalooza Colombia festival has been cancelled after headliner Rihanna backed out of the event on short notice.

While the organizers failed to single out a headliner in particular, Variety is reporting that local news outlets are claiming it was the Barbadian beauty. The “Needed Me” singer is said to have been concerned about the Zika virus.

Colombia has reported the second most Zika virus cases after Brazil. The virus is known to cause severe birth defects in babies.

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A statement published on the event’s website read as follows: “The organisers wish to express their deep appreciation to all the fans who supported the festival since day one, as well as the sponsors and the media partners. Wee [sic] hope to return in the future to realise this first edition of Lollapalooza in the country.”

Other headliners that were set to take the stage on September 17 and 18 include Lana Del Rey, Wiz Khalifa and Disclosure.