American Idol Adds 4th Judge: Kara DioGuardi

"We are turning the heat up on Idol this year and are thrilled to welcome Kara to the judges' table," said creator and executive producer Simon Fuller.  "She is a smart, sassy lady, and one of America's most successful songwriters.  We know she will bring a new level of energy and excitement to the show."

"We had originally intended for American Idol

American Idol judge earns more than David Letterman.

Simon Cowell made a whopping £25million last year - making him the highest paid star on US television.

The acid-tongued 48-year-old even beat chat show host David Letterman, 61, who earns £16million.

America Idol presenter Ryan Seacrest, 33, came in third, raking in £14.5million, according to TV