On TV: Clay Aiken, Raven, Ryan Cabrera

Pop stars on television this week include ‘American Idol’ season two runner-up Clay Aiken, who appears on ‘Larry King Live’ on Monday, ‘Today’ and ‘Total Request Live’ on Wednesday, and ‘Live with Regis and Kelly’ on Thursday; Raven Symone, who visits ‘TRL’ on Monday; Ryan Cabrera, who performs on ‘Jimmy Kimmel Live’ on Monday; Vanessa Carlton, who performs on ‘The Tonight Show with Jay Leno’ on Tuesday; Ashlee Simpson, who performs on ‘TRL’ on Thursday; John Mayer, who visits ‘TRL’ on Thursday; and Nelly McKay, who performs on ‘The Late Late Show’ on Thursday.