On TV: Dido, Hilary Duff, Ashlee Simpson

Pop music acts on television this week include Dido, who performs on ‘On Air with Ryan Seacrest’ on Monday; the ‘American Idol’ 12 finalists, who perform on ‘On Air’ on Tuesday; Hilary Duff, who phones into ‘Total Request Live’ on Tuesday to premiere her new video; Jessica Simpson, who hosts and performs on ‘Summer Music Mania 2004′ on Fox on Tuesday and performs on the WB’s ‘Pepsi Smash’ on Thursday; Ashlee Simpson, who performs on ‘TRL’ on Wednesday; Wilson Phillips, who performs on ‘Live with Regis and Kelly’ on Wednesday; and Mandy Moore, who appears on ‘The View’ on Friday with her ‘Saved!’ co-star Macaulay Culkin.