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JUSTIN BIEBER: Justin Bieber's mother caught her hair on fire as she blew out candles on her birthday cake on stage at the pop star's concert at Berlin's O2 World arena.

People.com said Bieber, 17, acted quickly and extinguished the flames that threatened mom Pattie Mallette's tresses.

"Mama, I'll always be your baby," Germany's Bild newspaper quoted Bieber as saying after he patted out the fire.

People.com said Monday Bieber and Mallette posted Twitter messages regarding Saturday night's incident.

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

Mallette thanked her son for the cake "[& embarrassing me on stage lol.]"

People.com did not report Mallette's age.

KATIE COURIC: U.S. broadcast journalist Katie Couric hasn't severed ties with CBS as rumors have claimed, however, she does want her own syndicated show, TMZ reported.

Couric, 54, has been the anchor and managing editor of "CBS Evening News" for five years but her contract expires in June, sparking media speculation about whether she will remain with the program, contribute to another existing show, start a new one on CBS or leave the network altogether.

TMZ quoted network sources it did not identify Monday as saying Couric likely will leave CBS because she feels her role there has been too confining and wants to start up her own syndicated talk show in September 2012.

The "CBS Evening News" has struggled in viewer ratings during Couric's tenure.

NORMAN REEDUS: U.S. director Michelle Danner's next film, "Hello Herman," will be about a bullied teen who snaps and shoots dozens of people, the drama's producers said.

Starring Norman Reedus, the movie has begun production in the Los Angeles area. It is Danner's second feature-length movie, following "How to Go Out on a Date in Queens."

Reedus is best known for his work in the "Boondock Saints" movies and the TV show "The Walking Dead."

"Taunted and tormented, [Herman] armed himself and took revenge by shooting dozens in a bloody fury. Now incarcerated, a national debate springs up around him as to whether or not to execute him. He'll tell his story to the world through one journalist, Lax Morales, an award-winning reporter who is haunted by his own past," said a synopsis of the film.

Reedus will play Lax. His love interest is played by Martha Higareda, while Rob Estes will play a political pundit.

The film also stars newcomer Garrett Backstrom as the teenage shooter Herman Howards.

John Buffalo Mailer, the son of Norman Mailer, adapted his play of the same name for the movie's screenplay.

OLIVIA WILDE: Hollywood actress Olivia Wilde said via Twitter she and Justin Timberlake are "just friends" and not dating, despite media reports suggesting they are.

Wilde recently filed for divorce from her husband, Tao Ruspoli, and Timberlake ended his romance with actress Jessica Biel last month.

E! News reported the pair, who co-starred in 2007's "Alpha Dog" and will soon be seen together in "Now," were out during the weekend on what appeared to be a date.

"Cool it, honeybadgers," Wilde Tweeted Monday in response to the report. "We are just friends and have been for years."