Lascivious R&B singer Trey Songz debuted at No. 1 on the U.S. pop charts this year with "Chapter V," his first No 1 album. Its pleasures are obvious – Songz has a likable falsetto and just enough balance between smooth and swaggering to make his radio-ready hits feel seductive and immediate. Nokia Theatre, 77 Chick Hearn Ct., L.A. 7:30 p.m. Sun. $50-$100. Nokiatheatre.com.