The Britain's Got Talent star was disturbed on Saturday night by a crazed woman threatening him with a brick.
According to the Daily Star, Jessie's management are now driving in extra security after her profile soared thanks to new BBC series The Voice.
The opening show on Saturday night was watched by just under 10 million viewers, and even beat Britain's Got Talent in their 20 minute head-to-head clash.
"Jessie has a great and close relationship with her fans and that will not change," a source told the newspaper. “But fame carries its risks, as proved by the incident involving Simon.
“We are just talking about an extra minder or two when the occasion merits it.
“There will also be a review of security around her home.”