On TV: Carrie Underwood, Goldfrapp, Aly & AJ

Pop acts on television this week include ‘American Idol’ season four champ Carrie Underwood, who visits ‘The Late Show with David Letterman’ on Monday and ‘Live with Regis and Kelly’ on Tuesday; Goldfrapp, who perform on ‘The Tonight Show with Jay Leno’ on Monday; Aly & AJ, who visit ‘Total Request Live’ on Monday; former O-Town star Ashley Parker Angel, who visits ‘TRL’ on Tuesday; James Blunt, who performs on ‘TRL’ on Wednesday; and Natasha Bedingfield, who performs on ‘TRL’ on Thursday.