She is to join previously announced artist Jason Aldean in the lineup of performers for the Jan. 9 event at the Nokia Theatre L.A. Live.
The People's Choice Awards are fan-voted prizes for excellence in movies, music and television.
"I am thrilled to announce that Christina Aguilera is joining Jason Aldean as a performer at the People's Choice Awards," telecast executive producer Mark Burnett said in a statement Wednesday. "Christina is one of my dearest friends and lights up literally every stage she steps onto. And I am so glad that I get to work with the amazing Jason Aldean again. I cannot wait to see these performances live on show night."