Credit: Todd Williamson/FilmMagic

Divas unite!

Cher and Christina Aguilera will share the podium at the 67th Annual Golden Globes Jan. 17.

Aguilera, 28, broke the news to at her New Year's Eve party at Tao/Lavo in Las Vegas, first explaining "[I'm] working with Cher in the new year with the movie."

She and Cher, 63, are costars in the still-shooting film Burlesque; their first 2010 public appearance together will be at the awards fest. "I'm looking forward to presenting at the Golden Globes with her... coming up very soon," Aguilera told Us.

Also starring Kristen Bell, Grey's Anatomy's Eric Dane and others, the racy Burlesque is the first movie role for the former Mickey Mouse Club star, who's also releasing her fourth album, Bionic, in March. "I'm entering a whole new episode of my life!" Aguilera said.

Her son Max (whose father is Aguilera's husband Jordan Bratman) celebrates his first birthday on Jan. 12. She said spending Christmas with her little boy was "my favorite thing about was really amazing!"