On TV: Katharine McPhee, Clay Aiken, Fiona Apple

Pop acts on television this week include ‘American Idol’ season five runner-up Katharine McPhee, who visits ‘The Dr. Keith Ablow Show’ on Monday; Elton John, who performs on ‘The Tonight Show with Jay Leno’ on Monday and ‘The Ellen DeGeneres Show’ on Tuesday; Jesse McCartney, who performs on ‘Live with Regis and Kelly’ on Tuesday; ‘Idol’ season two runner-up Clay Aiken, who performs on ‘Good Morning America’ on Tuesday, is interviewed on ‘GMA’ on Wednesday and Thursday, and performs on ‘The View’ on Friday; former *NSYNC star Justin Timberlake, who performs on ‘The Tonight Show with Jay Leno’ on Tuesday; Josh Radin, who performs on ‘Jimmy Kimmel Live’ on Tuesday; Fergie of the Black Eyed Peas, who visits ‘Total Request Live’ on Wednesday and performs on ‘The Late Show with David Letterman’ on Thursday; Meg & Dia, who perform on ‘Last Call with Carson Daly’ on Wednesday; The Human League, who perform on ‘Jimmy Kimmel Live’ on Thursday; Fiona Apple, who performs on ‘Last Call’ on Thursday; and John Mayer, who performs on ‘The Early Show’ on Friday.