Max was born on 12 January 2008, the day after Nicole gave birth to Harlow.
A source said: "The party was inspired by the children's book 'Where The Wild Things Are', so Christina and Jordan got people dressed as the characters to come along and surprise the kids.
"Everyone was out in the garden, which had multi-coloured balloons tied to all the tress and looked great. All the guests had a wonderful time, and Max and Harlow loved the attention."
Sounds like an amazing first birthday party & they had lots of great balloons!!