London, Apr 27 : Although `Girls Aloud' singer Sarah Harding is trying her best to remain fit for the band's UK tour, she has confessed that the routines are so tiring that she is struggling to keep up with them.

The blonde said that she was scared that she would black out on the first night of the `Out Of Control' shows, because of the tiring dance routines

The singer had to take an on-stage breather during the gig at Manchester's MEN Arena on April 24, because she couldn't keep up.

"I was really struggling for energy. I had to drop to the floor and make it look like part of the routine. I thought I might pass out," the Sun quoted the Brit-winner as saying.

Harding also said that she feared she could have left the arena with third-degree burns.

She added: "Our pyrotechnics are great. I'm worried, though. I wear a wig for a lot of the show and if one of those sparks go astray I could go up like a Christmas tree." (ANI)