On TV: Avril Lavigne, Ricky Martin, Taylor Hicks

Pop acts on television this week include Avril Lavigne, who visits ‘The Sauce’ on Monday, ‘The Late Show with David Letterman’ on Tuesday, ‘Live with Regis and Kelly’ and ‘Total Request Live’ on Wednesday and ‘The Ellen DeGeneres Show’ on Friday; Lily Allen, who performs on ‘The Tonight Show with Jay Leno’ on Monday and ‘The Ellen DeGeneres Show’ on Wednesday; ‘American Idol’ castoff Haley Scarnato, who visits ‘The Ellen DeGeneres Show’ and ‘Live with Regis and Kelly’ on Monday and ‘The Morning Show with Mike’ and ‘Fox & Friends’ on Tuesday; Ricky Martin, who visits ‘The Ellen DeGeneres Show’ on Tuesday; Pussycat Dolls, who appear on ‘TRL’ via web cam on Wednesday; Regina Spektor, who performs on ‘The Late Show’ on Friday; Morrissey, who performs on ‘Jimmy Kimmel Live’ on Friday; and ‘Idol’ season five champ Taylor Hicks, who performs on ‘Live with Regis and Kelly’ on Friday.