KIIS' Jingle Ball is an annual winter pop explosion that this year features Taylor Swift, Kesha, Justin Bieber and your usual suspects of top 40 singles fare (along with a smattering of electronic dance music stars like Zedd, Afrojack and YouTube denizen Psy). Proof positive that pop radio is maybe the most omnivorous space in music right now. Nokia Theatre, 777 Chick Hearn Court, L.A. 6 p.m. Sat and Mon. $85.25-$185.25. nokiatheatre.com.