Katy Perry cancels her scheduled Werchter Boutique concert after government officials order the event to stop for severe weather and crowd safety, affecting 55K attendees.Perry is backstage in hair and makeup when staff announce the cancellation; she posts on Instagram that the decision is out of her control, apologizes and says she had planned to wear her 2009 outfit.Perry performed at the
FIFA World Cup opening ceremony in the US earlier this year, released the single "
Watch It Burn" and is due to play
Depot Live at Cardiff Castle next.