The artists will appear via satellite from the Billboard Hollywood party. Fergie will host the West Coast portion of the ABC holiday special and will also sing two songs.
The 45th annual New Year's celebration is to begin live at 8 p.m. EST on Dec. 31 from New York's Times Square with Seacrest presiding over the festivities for the 11th time. Jenny McCarthy will once again provide commentary.
Additional performers will be announced soon, the network said.