Concert-goers, promoters, crew, vendors and bands from Toronto’s Vans Warped Tour stop July 4 are being asked to come forward if they remember seeing someone fitting the description of Hannah Batty, or to check their cell phones for inadvertently snapped photos or videos that she happens to be in. The 15-year-old, with long dyed blue hair and wearing a Ghost Town shirt — one of the acts on the bill — was last seen at the lakefront concert at The Flats at Molson Amphitheatre on the Ontario Place grounds at approximately 8 p.m.

Detective Constable Paraskevopulos of the Toronto Police Service tells Billboard she was not with her friends. It is her last known location. The public has also been asked to assist.

Batty is described as white, 5'5", 115 lbs., with brown eyes and long, dyed blue hair. She was wearing a black tank top, blue denim cut-off shorts and black Vans sneakers. She has stretchers in her earlobes.

There were multiple bands onstage in and around 8 p.m.: Bayside was on The Journey’s Stage; For Today just wrapped up on Kia Soul stage; Plague Vendor was on the Electric Soul stage; Bad Rabbits had just ended on the Warheads stage; I The Breather just went on the Ernie Ball stage; and One Ok Rock just ended on the Beatport stage; The Color Morale had just ended on the Monster Stage; Get Scared just ended on Hard Rock Kevin Says stage.

If any fans had taken photos of the bands from the audience, they may have captured Batty and the people she was with.

Police are concerned for her safety. D.C. Paraskevopulos says Lake Ontario near the venue has been checked. “All that stuff has been taken care of,” she says, adding, “It is a public park area so the cameras are being checked into by 14 Division.”

She says they are getting many tips about girls with blue hair. “People don’t realize how popular blue hair is.”

Anyone with information is asked to contact police at 416-808-2200, Crime Stoppers anonymously at 416-222-TIPS (8477), online at www.222tips.com, text TOR and your message to CRIMES (274637), or Leave A Tip on Facebook. Download the free Crime Stoppers Mobile App on iTunes, Google Play or Blackberry App World.