On TV: Enrique Iglesias, Hilary Duff, Jessica Simpson

Pop acts on television this week include Enrique Iglesias, who appears on the Ellen DeGeneres Show on Tuesday and the Tonight Show with Jay Leno on Wednesday; Cher, who apears on the CBS Early Show on Tuesday and Wednesday; Kelly Osbourne, who guest hosts for her mother on the Sharon Osbourne Show on Wednesday and Friday; Dido, who performs on Last Call with Carson Daly on Wednesday; Hilary Duff, who lip-synchs on on Live with Regis and Kelly on Thursday; Jessica Simpson, who appears on the Tonight Show with Jay Leno on Friday; Jason Mraz, who performs on the Late Late Show with Craig Kilborn on Friday; and on TRL UK, watch for Sophie Ellis Bextor and the Sugababes on Monday, former Spice Girl Victoria Beckham on Tuesday, and the Cheeky Girls on Wednesday.