Robbie Williams may be forced to cancel a 160,000 capacity concert in Germany - in case he disturbs bats.

The heartthrob singer is due to perform in a field near Cologne this August, but scientists fear it could affect the rare Daubenton's and Pipistrelle bats living in surrounding woods.

They are now conducting a study to see if they can protect the nocturnal animals from the noise.

Show organizers, Concert Team, will have to pay for the research.

Spokesperson Annette Roettgen said: "It is still cheaper then paying damages later. We will do everything we are asked for, so that the animals will survive the Robbie concerts."

Meanwhile, Robbie is reportedly set to make a staggering

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