But now the cracks may be starting to show.

It's rumoured that Susan has a big crush on BGT judge Piers Morgan. On Monday night's show she even dedicated one of her famous hip swivels to him saying, "This is for you Piers baby."

But recently she was watching another heat of the semi-finals in a packed out hotel bar in London.

Piers made a comment about talented 12-year-old Shaheen Jafargholi. Piers said the boy''s performance had been, "The best singing performance we have heard in the semi-finals so far."

When this comment was shown on the TV screen in the bar Susan apparently started sticking two fingers up at the TV screen shouting, "F**k off" before then storming out leaving lots of shocked onlookers in her wake.

Her spokesperson of course denies this but one thing we've noticed about good old SuBo, she's a live-wire and it doesn't sound all that unbelievable.