On TV: Missy Higgins, Katy Perry, Pussycat Dolls

Pop acts on television this week include:

Nick Lachey, who hosts ‘High School Musical: Get in the Picture’ (ABC) on Monday.

Missy Higgins, who performs on ‘The Tonight Show with Jay Leno’ (NBC) on Thursday.

Lykke Li, who performs on ‘Late Night with Conan O’Brien’ (NBC) on Thursday.

Katy Perry, Jesse McCartney and Pussycat Dolls, who all perform on ‘Today’ (NBC) on Friday.