Kylie's remarkable return over the weekend has had the breaks put on it slightly as she pulled out of last night's gig with U2.

The Pop Queen of Hearts was due to sing with Bono and the boys to thank him for joining her on stage on Sunday, where he sang Robbie's part in a rendition of Kids.

Kyles, who is still recovering from the intensive treatment she's had for breast cancer, found the two stunning shows she put on over the weekend grueling and she has been left shattered.

A source told The Sun today that: "Kylie explained to Bono that she had worn herself out. He told her to spend Monday resting, get her energy levels fully restored and relax."

There were no hard feelings though, and U2 paid tribute to her inspirational recovery from breast cancer by playing a verse from 'Can't Get You Out of My Head.' And do you know what, Kylie? We cant either.

'SL'