E! News catches up with 'American Idol' judge Carrie Underwood at the season finale. Plus, Jessica Simpson performs during the show and dishes on a possible tour.

Jessica Simpson returned to television screens following a 15-year absence. Simpson, 44, performed during the Sunday, May 18, American Idol finale, hitting the stage to deliver two tracks: her new song "Blame Me" and her famed 2005 rendition of "These Boots Are Made For Walkin,

Jessica Simpson made her TV comeback during the last episode of American Idol, where she took the stage to perform a duet with former contestant Josh King.

Jessica Simpson debuted a brand-new hair color as made a special appearance on the season 23 finale of 'American Idol'. The dirty blonde look, crafted by celebrity hair colorist and salon owner Rita Hazan,