Justin Bieber Saves His Mom from 'Happy Birthday' Hair Fire.

Justin Bieber is his mom's hero.

On Saturday, Bieber celebrated his mother Pattie Mallette's birthday before thousands of fans at a Berlin concert with a round of "Happy Birthday" and a cake lit with candles.

Unfortunately, Mallette leaned in a little too close when making her birthday wish and ended up singeing a few strands of her hair. Justin, of course, rushed to pat his mom's hair.

Bieber tweeted, "sick show in Berlin...brought @studiomama on stange 2 sing her happy bday but she lit her hair on fire with the candles. lol. i saved her."

Justin recently voiced his desire to star in a comic book movie. Seems he'd make a fantastic superhero.