On TV: Jessica Simpson, Justin Timberlake, Paolo Nutini

Pop acts on television this week include Jessica Simpson, who visits ‘The Ellen DeGeneres Show’ on Monday; Justin Timberlake, who performs on ‘The Late Show with David Letterman’ on Monday and ‘Good Morning America’ on Friday; Paolo Nutini, who makes his American television debut on ‘The Late Late Show with Craig Ferguson’ on Monday; John Mayer, who performs on ‘Late Night with Conan O’Brien’ on Tuesday and Wednesday and ‘The Ellen DeGeneres Show’ on Friday; ‘America’s Got Talent’ winner Bianca Ryan, who visits ‘The Ellen DeGeneres Show’ on Wednesday; Hilary Duff, who visits ‘The View’ on Thursday; Landon Pigg, who performs on ‘Last Call with Carson Daly’ on Thursday; ‘American Idol’ season two runner-up Clay Aiken, who performs on ‘The Tonight Show with Jay Leno’ on Friday; and Fergie of the Black Eyed Peas, who performs on ‘Today’ on Friday.