The Catchphrase presenter got soaked with water by Holden for the second time in as many months during his appearance on This Morning.
Holden decided to throw caution to the wind to mark her final day covering Holly Willoughby's maternity leave.
Back in May, Holden soaked Mulhern with four glasses of water after he showed a picture of what she might look like in 20 years' time.
Asked about rumours he won't be back on Britain's Got More Talent next year, Mulhern replied: "Of course I'm coming back, it's the tenth year next year."
That was the moment Holden decided to remind viewers why rumours started about his future, chucking a glass of water over him and saying: "It wasn't because of this, was it?"
"Did you know she was going to do that?