Pop acts on television this week include Hilary Duff, who co-hosts ‘Total Request Live’ Monday thru Thursday; Mika, who performs on ‘The Tonight Show with Jay Leno’ on Monday and ‘Good Morning America’ and ‘Jimmy Kimmel Live’ on Thursday; ‘American Idol’ castoff Stephanie Edwards, who visits ‘The Ellen DeGeneres Show’ on Monday; Jennifer Lopez, who visits ‘TRL’ on Tuesday; and ‘Idol’ season five finalist Elliott Yamin, who visits ‘The Ellen DeGeneres Show’ on Tuesday.