Justin Bieber, Ellie Goulding, The Wanted, PSY Added to "Dick Clark's New Year's Rockin' Eve with Ryan Seacrest 2013"

Even more performers have joined the lineup for   Dick Clark's New Year's Rockin' Eve with Ryan Seacrest 2013, which will air on ABC December 31.

Joining Carly Rae Jepsen , Neon Trees and Taylor Swift live in New York City's Times Square will be PSY ,  because we all want to ring in the New Year by doing the "Gangnam  Style" horse dance, right?  Meanwhile, during the West Coast party  portion of the program, Justin Bieber will be on hand to rock the crowd, as well as The Wanted and Ellie Goulding .  They'll join previously-announced performers Flo Rida , Karmin , Brandy , OneRepublic and Pitbull .