Not bothered by the rain, the Californian pop star kept dry under a Union Jack umbrella and stepped out in a Swan Lake-inspired Marchesa tutu dress with a slick up-do.
Katy's high oversized domed chignon was finished off with a gold chain headband.
The singer revealed on the red carpet that her hair - currently purple - has been every colour from baby blue to jet black because she hates her own natural'squirrel colour'.
And, who wants to be a squirrel when you can be a swan, eh, Katy?

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Bonita Turner
