Francis Dianne Cervantes, a councilor who was a former Miss Earth Philippines, was shot by a lone gunman as she and a companion were on their way to Paombong town on Tuesday night.
Cervantes is a concilor in Hangonoy serving her third term.
She was crowned Miss Earth in 2006.
She suffered bullet woulds to the face and was taken to the Bulacan Medical Center in Malolos City, reported the Philippine Inquirer. She was later transferred to a hospital in Metro Manila.
The gunman attacked Cervantes and a friend as they rode a motorcycle around 7 p.m.
The gunman approached the pair and shot Cervantes after she and her friend fell from the motorcycle. The gunman had a helmet on.
Investigators are trying to establish a motive.