The pop group confessed that Ian 'H' Watkins's friendship with the US superstar while they supported her North American tour caused tension in the band.
© Sky
Revealing all in their Sky Living series Steps Reunion, the 'Tragedy' performers admitted that problems first arose when H started flying in Spears's private jet while the rest of them travelled by bus.
The Sun quotes Lisa Scott-Lee as saying: "It got people's backs up."
Further cracks apparently appeared when Claire Richards discovered that H had been secretly dating the band's manager Tim Byrne.
Steps Reunion starts tonight on Sky Living at 9pm.
> Steps unveil 'The Ultimate Collection' album
Watch Digital Spy's exclusive interview with Steps below:
