The unidentified source said during the 26th birthday party for Queens of Noise disc jockey Mairead at a London nightclub, Moss appeared to be trying her best to win at the event's traditional children's games, The Daily Mirror said Saturday.

"First up, was a giant game of Pass the Parcel. Every time the music stopped Kate looked gutted when she wasn't left holding the prize," the source said.

"And she also held on to the bundle for an indecently long period of time -- she's clearly been picking up tips from friends of her 5-year-old daughter, Lila Grace."

The insider said the 34-year-old model even got aggressive with some of her younger opponents during a routine game of Musical Chairs, the Mirror said.

"At one point, she was sprinting between the seats, knocking anyone flying who was silly enough to get in her way," the source told the newspaper.