4-year-old girl battling brain cancer meets Justin Bieber

MILWAUKEE, Wis.

A radio station gave Hailey Roser tickets to Bieber's concert in Milwaukee on Sunday. But she almost missed the event due to a deadly shooting at a nearby spa that locked down the hospital.

Fortunately, the lockdown was lifted in time for an ambulance to take Hailey to the concert, where she met her favorite pop star backstage.

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