On TV: Clay Aiken, Ryan Cabrera, John Mayer

Pop acts on television this week include ‘American Idol’ season two runner-up Clay Aiken, who discusses his new book on ‘The Early Show’ on Monday; Ryan Cabrera, who performs on ‘Live with Regis and Kelly’ on Tuesday; No Doubt singer Gwen Stefani, who performs on ‘Jimmy Kimmel Live’ and ‘The Ellen DeGeneres Show’ on Wednesday; John Mayer, who performs on ‘The Late Show with David Letterman’ on Thursday while his ex-girlfriend Jennifer Love Hewitt visits ‘The Tonight Show with Jay Leno’ across the coast on the same night; and JoJo, who performs with Bow Wow on ‘Live with Regis and Kelly’ on Friday.