On TV: John Mayer, Mario Vazquez, Jessica Simpson

Pop acts on television this week include John Mayer, who performs on ‘The Tonight Show with Jay Leno’ on Monday; Amos Lee, who performs on ‘The Late Late Show with Craig Ferguson’ on Monday; Mario Vazquez, who performs on ‘Total Request Live’ on Tuesday; Jessica Simpson, who visits ‘TRL’ on Wednesday; Jose Gonzalez, who performs on ‘Last Call with Carson Daly’ on Thursday; and Ray LaMontagne, who performs on ‘The Tonight Show’ on Friday.