Paula Abdul Officially Joins Simon Cowell on U.S. 'X Factor'

Everyone's favorite reality TV couple are back together. After weeks of rumors and a reported 11th-hour contract signing that nearly derailed the first day of auditions, former "American Idol" judge Paula Abdul will has officially taken her seat beside her ex-"Idol" sparring partner Simon Cowell on his upcoming U.S. version of "The X Factor."

Announced on Sunday evening, the addition of Paula Abdul to the show completes the judging panel, which also includes former music executive Antonio "L.A." Reid and British singer and U.K. "X Factor" judge Cheryl Cole.

According to reports, Cowell was prepared to pull the plug on Sunday's auditions when Paula Abdul didn't sign her contract until just before taking the stage.

"I am excited beyond words to be a part of the 'X Factor.' I couldn't be happier to bring my love for cultivating talent and performance to such a wildly anticipated show," said Paula Abdul in the announcement. "[I] know that it will be an extraordinary journey — we're going to have a blast. I'm also delighted and grateful to be sitting next to Simon again ... but you might want to check back with me in a week or two!"

Open auditions for the show will continue in Dallas on May 26. Unlike other reality singing competitions, contestants on "X Factor" sing in front of an audience of thousands as well as the four judges in their first audition.

Though Cowell told the audience that they would serve as the "fifth judge" and be relied on to help decide who will get the $5 million grand prize, The Hollywood Reporter said the crowd apparently was taking that advice too far and had to be asked by producers to boo the singers less as a way to "temper negativity on the show."

The program also revealed its co-hosts over the weekend, former Pussycat Dolls singer Nicole Scherzinger and British TV personality Steve Jones. Though her solo singing career has struggled to take off, Scherzinger has found success as a guest judge on the U.K. version of "The X Factor."

Scherzinger, too, said she was excited to be on the Stateside version of the program, which is slated to launch in the fall. "I am thrilled to be asked by Simon Cowell to host 'The X Factor'," said the singer, who also is a one-time "Dancing With the Stars" winner. "I loved working alongside Simon on the U.K. show, and cannot wait to see what he has in store for the U.S. I'm so excited to work with Steve Jones and help discover astounding talent from across the country!(S)