Justin Bieber performs live for fans at Brisbane Entertainment Centre in Brisbane, Australia on Nov. 27.
Ke$ha is seen arriving at LAX airport on Nov. 26.
Musician Ringo Starr attends the taping of Dave Stewart's Show, 'The Ringmaster' at Bite Size TV's Hollywood Studio in Hollywood, Calif. on Nov. 26.
Actor Ryan Reynolds attends 'El Hormiguero' Tv show at Vertice Studio in Madrid on Nov. 26.
Russell Simmons and Forest Whitaker attend PANDORA Jewelry and Moto X present Lee Daniels' "The Butler" at cinema privas at in West Hollywood, Calif. on Nov. 26.
Cuba Gooding Jr., Frances Fisher and Rosanna Arquette attend PANDORA Jewelry and Moto X present Lee Daniels' "The Butler" at cinema privas at on in West Hollywood, Calif. on Nov. 26.
Justin Timberlake performs at The Staples Center in Los Angeles on Nov. 26.
John Stamos is seen arriving at LAX on Nov. 26.
Snoop Lion sits on set during filming of SKEE Live on Los Angeles on Nov. 26,
Champions Amber Riley and Derek Hough from Season 17 of "Dancing With The Stars" visits Times Square in New York on Nov. 27.
Mike Tyson attends a signing for his book "Undisputed Truth" at Barnes & Noble bookstore at The Grove in Los Angeles on Nov. 26.
Selena Gomez performs in concert during her Stars Dance Tour at The Palace of Auburn Hills in Auburn Hills, Mich., on Nov. 26.
Kanye West visits the SiriusXM Studios in New York on Nov. 26.
Madeline Follin of Cults performs on stage at Webster Hall in New York on Nov. 26.
Sophie Ellis-Bextor switches on the Christmas lights at Mahiki London on Nov. 26.
Director Quentin Tarantino arrives on "The Tonight Show" on Nov. 26.
Jason Statham is seen arriving at LAX on Nov. 26.
John Legend performs at Crackle's "Playing It Forward," presented by FedEx in Culver City, Calif. on Nov. 26.
Eve attends Claridge's Christmas Tree By Dolce & Gabbana launch party at Claridge's Hotel on in London on Nov. 26.
Jessica Alba is seen in Los Angeles on Nov. 26.
Prince William, right, sings with Taylor Swift, left, and Jon Bon Jovi at the Centrepoint Gala Dinner at Kensington Palace in London, Nov. 26. Centrepoint is a charity supporting homeless young people aged 16-25 and the Duke is patron of the organization.
Colin and Livia Firth arrive at Kensington Palace for the Centrepoint Winter Whites Gala in London on Nov. 26.
Tinie Tempah arrives at Kensington Palace for the Centrepoint Winter Whites Gala in London on Nov. 26.
Eliza Doolittle arrives at Kensington Palace for the Centrepoint Winter Whites Gala in London in Nov. 26.
Michelle Dockery attends the Winter Whites Gala at Kensington Palace in London on Nov. 26.
Kim Kardshian and baby North West are seen stepping out of their SoHo apartment in New York on Nov. 26.
Ralf Bauer attends Jaeger-LeCoultre Cocktail at Charles hotel in Munich on Nov. 26.
Rebecca Hall attends the photo call for "Machincal" on Broadway at East 31st in New York on Nov. 26.
Bobby Flay visits the Elvis Duran Z100 Morning Show at Z100 Studio in New York on Nov. 26.
Actresses Octavia Spencer, left, and Paula Patton speak onstage during Piaget at 2014 Spirit Awards nominations press conference in Hollywood, Calif., Nov. 26.
Naomi Watts and Liev Schreiber are seen walking with their children, Sasha Schreiber and Sammy Schreiber in New York on Nov. 26.
Actor Callan McAuliffe announced as UNICEF ambassador at Soho Metropolitan Hotel in Toronto on Nov. 26.