On TV: Daniel Powter, Ace Young, Mandy Moore

Pop acts on television this week include Daniel Powter, who performs on ‘The Tonight Show with Jay Leno’ on Monday and ‘The Ellen DeGeneres Show’ on Thursday; the Wiggles, who perform on ‘The Late Late Show with Craig Kilborn’ on Monday; ‘American Idol’ castoff Ace Young, who visits ‘Live with Regis and Kelly’ and ‘The Ellen DeGeneres Show’ on Monday; ‘American Idol’ season four finalist Mikalah Gordon, who visits ‘The Tyra Banks Show’ on Monday; Nick Lachey, who premieres his new video on ‘Total Request Live’ on Monday; Mandy Moore, who visits ‘Late Night with Conan O’Brien’ on Tuesday and ‘The Late Late Show’ on Friday; Jennifer Love Hewitt, who visits ‘The Tonight Show’ on Thursday; JoJo, who visits ‘TRL’ on Thursday; and Imogen Heap, who performs on ‘The Tonight Show’ on Friday.