On TV: Jennifer Lopez, Lily Allen, Ashley Tisdale

Pop acts on television this week include Glen Hansard and Marketa Irglova, who perform on ‘The Tonight Show with Jay Leno’ on Monday, ‘The Late Late Show with Craig Ferguson’ on Wednesday and ‘Last Call with Carson Daly’ on Friday; Jennifer Lopez, who visits ‘The Tonight Show’ on Monday; Nellie McKay, who performs on ‘The Late Late Show’ on Monday; Marc Anthony, who visits ‘The Early Show’ on Monday, ‘The Tonight Show’ on Tuesday and ‘Jimmy Kimmel Live’ on Wednesday; Tegan & Sara, who perform on ‘Late Night with Conan O’Brien’ on Tuesday; Lily Allen, who performs on ‘Last Call’ on Tuesday; Nelly Furtado, checks into ‘Total Request Live’ on Wednesday via webcam and premieres her new video; Marie Digby, who performs on ‘Last Call’ on Thursday; Zac Efron, who visits ‘The View’ on Thursday; Ashley Tisdale, who visits ‘Live with Regis and Kelly’ and ‘The Sauce’ on Thursday; Drake Bell and Josh Peck of ‘Drake & Josh’, who perform on ‘Today’ on Thursday; Kat DeLuna, who performs on ‘TRL’ on Thursday; and Squeeze, who perform on ‘The Sauce’ on Thursday.