According to the Daily Record, the singer delayed the video shoot for the show's charity single by six hours yesterday after suffering a panic attack.
A source told the newspaper: "Katie is very fragile and we are very concerned for her.
"We are considering asking her to step aside because it is now really affecting the show. Her well-being is our number one priority."
The alleged insider continued: "Everyone is fed-up with her diva-like antics. They feel as though she thinks the whole show revolves around her... She's hugely stressed."
Waissel reportedly spent the night 'crying hysterically' and having further panic attacks.
> Katie Waissel 'collapses in Topshop'