A Keri Hilson fan was punched in the face and dragged off a stage by three bodyguards and the R&B star's drummer after attempting to kiss her at a concert.
The Knock You Down hitmaker was performing at a show in Europe earlier this month (Oct11) when the incident happened.
Footage posted on GlobalGrind.com shows a man leaping onstage and approaching Hilson as she prepares to sing her final song of the evening.
As he reaches his arms around her and leans in for a kiss, a security guard races from the wings and drags the man away, but Hilson is pulled along with him.
Two more bouncers move in and one of them punches the unidentified man in the face before Hilson's drummer leaps from behind his kit and helps them drag the man off the stage. Hilson was shaken but apparently unharmed, and managed to complete her performance.
Online reports suggest the incident took place at a venue in Paris, France, although Hilson's official list of dates on her current world tour does not include a gig in the city.
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The film is expected to continue without Mendes' involvement.