LOS ANGELES, July 10 (UPI) -- Kristen Stewart
, Robert Pattinson
's ex-girlfriend, found the message "I [heart] Rob" scrawled on her dirty car when it was parked in Hollywood, E! News said.
Stewart appeared unfazed by the incident and drove off without altering the unknown prankster's handiwork, the entertainment news outlet said Tuesday.
The former couple, who appeared together in the blockbuster "Twilight" film franchise, ended their more than three-year-long relationship in May.
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