According to US Weekly, the winning bidder coughed up $53,529 for the celebrity smooch and a signed bottle of Moet & Chandon champagne.
Stone and Moss co-hosted the event to help raise money for AIDS research, the Daily Mail reported, but it's not the first time Moss traded a kiss for cash.
The 39-year-old model once kissed businessman Hosh Ibrahim for a $7,500 donation to a Children's Hospital in 2010.
''She tastes as good as she looks,'' Ibrahim said at the time.
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