On TV: Lindsay Lohan, Katharine McPhee, Christina Aguilera

Pop acts on television this week include Lindsay Lohan, who visits ‘The Late Show with David Letterman’ on Monday; ‘American Idol’ season five runner-up Katharine McPhee, who visits ‘The Early Show’ on Monday; James Blunt, who performs on ‘The Early Show’ on Tuesday; Natasha Bedingfield, who is featured on ‘Total Request Live’ on Tuesday and performs on ‘Today’ on Friday; ‘American Idol’ season four drop-out Mario Vazquez, who is featured on ‘TRL’ on Wednesday; ‘American Idol’ season one champ Kelly Clarkson, who performs on ‘The View’ on Thursday; Christina Aguilera, who performs on the MTV Movie Awards on Thursday; Jessica Simpson and former *NSYNC star Justin Timberlake, who present at the MTV Movie Awards on Thursday; Brandi Carlisle of The Go-Go’s, who performs on ‘Late Night with Conan O’Brien’ on Friday.