Gwen Stefani put her signature style front and center when she reunited with her No Doubt bandmates for the FireAid Benefit ...

St. Vincent performs with Krist Novoselic of Nirvana onstage during the FireAid Benefit Concert for California Fire Relief. (John Shearer/Getty Images for FireAid) ...

The singer-songwriting performed her hit "I Love You, I'm Sorry" before giving her own interpretation of a Counting Crows ...

There’s a bit of a paradox to these. The sort of people who follow music — say, by reading pop music columns — have probably known about many featured artists for a while. The sort of people who don’t ...