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 / Updated  / Source: Us Weekly

Justin Bieber's got a hot mama — literally!

Pattie Mallette was surprised when her son called her on stage at the end of his Berlin concert Saturday and presented a cake for her 35th birthday. But the 17-year-old pop star was really shocked when he noticed his mom's hair was on fire!

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As his audience sang "Happy Birthday" to Mallette, she leaned in a little too close as she blew out her candles. Bieber quickly noticed a few strands of her hair had caught on fire and immediately patted down Mallette's mane. "Extra" has a video of the incident here.

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He later Tweeted about the incident: "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."

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Mallette added, "Thank you for all your b-day wishes!! All I want is your prayers. Thank u @justinbieber for the cake (& embarrassing me on stage lol.) Xo."