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Kylie Minogue was forced to pull out of a U2 concert due to exhaustion.
The Australian pop star is reportedly worn out after putting so much effort into the opening dates of her rescheduled Showgirl Homecoming Tour.
She had promised U2 frontman Bono that she would sing at the concert to thank him for performing on stage with her at her gig on Sunday, but she was not up to performing with the band in Sydney.
A source told The Sun "Kylie called Bono to explain that she had worn herself out. He told her to spend Monday resting, get her energy levels fully restored and relax.
"It wasn't a problem at all. Everyone realises Kylie is putting herself through the mill for her tour."
