Justin Bieber always promises an action-packed show for his fans. But at his concert this past Saturday night in Berlin, things got really crazy!

At the end of his show, the pop star brought his mother, Pattie Mallette, up on stage and surprised her with a birthday cake for her 35th birthday. But as she leaned in to blow out the candles, her hair caught on fire, UsMagazine.com reports.

While the audience sang 'Happy Birthday,' the 17-year-old noticed that several pieces of his mom's hair were on fire. He quickly reached over and patted the fire out. Bieber saved the day! Watch video of the incident at Extra here.

Bieber tweeted about the event: "Sick show in Berlin... brought @studiomama on stage 2 sing her happy bday but she lit her hair on fire with the candles. lol. i saved her."