The This Morning presenters had been trying different types of fizz in the outdoors ice rink on the show when it seems the bubbles went to Holly's head.
Phillip revealed to viewers that one of the This Morning crew who looks after their outfits had placed body warmers in strategic places to keep them warm while they filmed outside.
He said: "What Dave has done is secreted hand warmers in various parts of our clothes, and I have just discovered one in this pocket here that is heating my kidneys like you wouldn't believe.
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"And I've got one in the palm of this hand," as he pointed towards his glove."
Determined not to be outdone, Holly dropped a bombshell about where her body warmers were.
She said: "Well I can raise yours as I've got one in both of my hands and I've also got two in my bra.
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"And they are getting really hot, I am actually a little flushed, so now you know why."
The pair quickly went to a break as Phil burst into laughter at the shock confession.
Meanwhile, the pair spoke to Britain's Got Talent judge Amanda Holden about her work with Save The Children.
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However, fans got distracted as they noticed that Amanda may have indulged in some cosmetic procedures before appearing on the show.
This Morning continues on Monday at 10.30am on ITV.