On TV: JoJo, Avril Lavigne, Jason Mraz

Pop acts on television this week include ‘American Idol’ champ Kelly Clarkson, who appears on ‘The Ellen DeGeneres Show’ on Monday; JoJo, who stops by ‘Total Request Live’ with her new video on Tuesday; Avril Lavigne, who appears on ‘The View’ on Wednesday and ‘The Late Show with David Letterman’ on Thursday; Jason Mraz, who appears on ‘Jimmy Kimmel Live’ on Thursday and ‘The Ellen DeGeneres Show’ on Friday; Ryan Cabrera, who performs on ‘TRL’ on Thursday; 98 Degrees singer Nick Lachey, who appears on ‘Live with Regis and Kelly’ and ‘TRL’ on Friday.