ABC has added "Gangnam Style" singer Psy to its New York lineup for "Dick Clark's New Year's Rockin' Eve with Ryan Seacrest," joining previously announced performers Taylor Swift, Carly Rae Jepsen and Neon Trees. The network has also added Justin Bieber, Jason Aldean, Greyson Chance, Ellie Goulding and The Wanted to its West Coast party, which will be hosted by Fergie.

NBCUniversal has promoted Catherine Balsam-Schwaber to senior vice president, working with its Integrated Media Group. Balsam-Schwaber was most recently senior vice president of marketing for iVillage.

PBS has promoted Beth Hoppe to chief programming executive as well as general manager for general audience programming. She was previously vice president of general audience programming. Hoppe replaces John Wilson, who has taken a new role as senior vice president of pledge strategy and special projects.

TV syndicator Telepictures has promoted Jill Olsen to senior vice president of finance, reporting to executive vice president of business and legal affairs David Decker. Olsen was previously senior production executive.

Digital agency Profero has named Matthew Capala head of search, effective immediately. Capala is also an adjunct professor at NYU, where he teaches a course on search marketing.

Pat Cavanaugh has been promoted to senior vice president of finance at YES Network, reporting to chief operating officer Ray Hopkins. Cavanaugh joined YES in 2002 as a senior accountant.

AMC has named John Wirth executive producer and showrunner on the drama "Hell on Wheels," which has been picked up for a third season. Wirth will replace John Shiban, who was showrunner for the first two seasons.

Bob McManus, editorial page editor at The New York Post since 2000, is retiring from the newspaper in January. McManus has been at the paper since 1984. Post columnist Fred Dicker broke the news on his radio show.

The Associated Press has named Janelle Cogan South desk editor, based in the organization's Atlanta bureau. Cogan previously covered local news as an assistant editor at The Virginian-Pilot.

Magazine publisher Niche Media has named Norman M. Miller executive director in charge of luxury brands. Miller joins from Martha Stewart Living Omnimedia, where he was integrated sales director.

Online social news organization BuzzFeed has promoted McKay Coppins to political editor, working alongside editor in chief Ben Smith. Coppins previously led the web site's coverage of Mitt Romney's presidential campaign.

Gregg Braff has been named manager of member services at the Digital Place-based Advertising Association, replacing Noah Klas, who was promoted to director of member services. Braff had been a media assistant at Pearson Education.

Tags: Ben Smith, David Decker, Jill Olsen, John Shiban, Matthew Capala, Noah Klas, Pat Cavanaugh, Ray Hopkins, Ryan Seacrest