Dick Clark Productions said Thursday Jason Derulo and Enrique Iglesias will sing on the Los Angeles portion of the program, which will air on ABC.
Seacrest is to preside over the festivities in New York's Times Square, with the help of Jenny McCarthy, while Fergie of the Black Eyed Peas will return as host of the show's West Coast party.
"As the New Year's Rockin' Eve legacy continues, it is an honor to be a part of the largest celebration of the year," said Fergie in a statement. "I am excited to share the stage with so many global stars."
Celebrity Families of 2014 [PHOTOS]