Katy Perry has been struck down with food poisoning

The 'Teenage Dream' hitmaker ' who is currently performing across the US as part of her 'California Dreams' tour - has been forced to cancel a number of her concerts after suffering from 'severe dehydration' as a result of the sudden illness.

According to a statement from promoters Jam Productions, the singer has rescheduled her July 8 show at Chicago's Allstate Arena for August 21, and her July 9 gig at St. Paul's Xcel Energy Center for August 23.

Katy said: ' apologise to my fans in Chicago and the Twin Cities for not being able to perform this weekend, but I am going to return in a few weeks to give them the very best show ever!"

This isn't the first mishap Katy has suffered while on tour, as the star recently had to hire a cat whisperer to control her and husband Russell Brand's trio of unruly felines, Krusty, Kitty Purry and Morrissey, who kept misbehaving while she was on the road.

She explained: "He realigned their chakras and did some hypnosis. We were like, 'Wow, this is extravagant!'"

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