Queen Elizabeth was desperate to shake "grisly" cold in time for the Buckingham Palace party.
Queen Elizabeth
The 90-year-old royal had been struck down with a terrible cold over December last year, which stopped her from attending a number of events and from travelling to her Sandringham Estate in Norfolk, but her goal was to get rid of the pesky illness so she could enjoy the gathering at the London site.
And the Queen's attendance at the bash and the fact she is cold-free pleased a number of guests.
Speaking about the monarch and her health during a speech at the Order of Companions of Honour service at the palace, which has been obtained by the Mirror Online, Lady Williams of Crosby said: "I was delighted she was able to make this and was now better.
"She said they had a big party in the palace so she had to get better, so she did get better.
"She also said it was a particularly grisly mixture of cold and flu which had been going around, lots of people have had it."
The 86-year-old politician has praised the Queen for her "sweet" and "charming" temperament.
She said: "She's as sweet as ever and very charming. And very friendly."
And Lady Williams believes the Queen looked "very good" during the appearance.
She continued: "She looked good, I'm glad to say - she looked very good."
Meanwhile, the Queen has had a busy few weeks as she recently paid her respects to those who died in the natural disaster at the opening of the Canterbury Earthquake National Memorial earlier in the week, which remembered the victims and their families on the sixth anniversary of the Canterbury Earthquake in New Zealand.
Speaking at the event, she said: "As you gather today to dedicate the new Canterbury Earthquake National Memorial, there will be difficult and painful memories, but also memories of many heroic and selfless acts, of the caring and creative nature of the Christchurch people, and of the help that came so readily from emergency and rescue personnel.
"I hope that the new memorial will provide a place to remember, to grieve for what is lost, and to give thanks for what remains."
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