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Perry is said to have worn an astronaut costume as she presented Russ with his £100,000 gift at his surprise birthday party in LA.
A source told The Sun: "Russell thought it was just him and Katy going for dinner. He was bowled over when he walked into the restaurant and saw she had got all his pals and family together for a surprise party,"
They added: "Halfway through the dinner she walked in wearing a full astronaut outfit to give Russell the space trip."