Justin Bieber Sets His Mom's Hair on Fire on Stage
04/04/2011 AT 02:00 PM EDT
The pop star, 17, surprised Pattie Mallette with a birthday cake at the end of the concert at Berlin's O2 World arena. But as she leaned over the cake to blow out the candles, a few strands of her hair caught on fire.
Bieber quickly put out the flames, and then said, "Mama, I'll always be your baby," according to Germany's Bild newspaper.
Mother and son both Tweeted about the incident later. Bieber wrote: "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."
Mallette wrote: "Thank u @justinbieber for the cake (& embarrassing me on stage lol)."