Security software firm McAfee she was the "most dangerous" celebrity to search for online because many sites use her name to trick users into downloading malicious software or to steal personal information.
When searching for the 22-year-old Watson, there is a one-in-eight chance of landing on a malicious site.
It is the sixth time the Intel-owned company has conducted the study, which was last year topped by Heidi Klum. Female celebrities are far more likely to be utilised by cyber criminals.
Others among the riskiest celebrities to search online are Jessica Biel, Eva Mendes, Selena Gomez and Halle Berry.
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Someone will break a promise to you, which is disappointing. Don't let this setback stop you from crossing the finish line. You may have to submit an entry late or attend the last few minutes of a meeting, but take heart. Rallying in the midst of difficult circumstances will count in your favour. Someone else may get a job or scholarship, but you'll be in the running for the next opportunity. In the meantime, have an alternative plan ready when relying on others for help.More