According to the CBS press release…
The hottest stars of film, television and music, including Jensen Ackles, Stephen Amell, Jennifer Aniston, Ellen DeGeneres, Robert Downey Jr., Johnny Galecki, Josh Hutcherson, Regina King, Jennifer Lawrence, Chloë Grace Moretz, Olivia Munn, Chris O’Donnell, Jason O’Mara, Jared Padalecki, Eddie Redmayne, Marisa Tomei, Casey Wilson, The Wanted and many more are scheduled to attend the PEOPLE’S CHOICE AWARDS 2013, to be broadcast live from the Nokia Theatre L.A. Live in Los Angeles, Wednesday, Jan. 9 (9:00-11:00 PM, live ET/delayed PT) on the CBS Television Network. Kaley Cuoco (THE BIG BANG THEORY) will host, and Christina Aguilera, Jason Aldean and Alicia Keys will perform, as previously announced.