The Times documented Grammy rehearsal at the Staples Center on Jan. 23, 2014.
Grammy executive producer Ken Ehrlich, center, backstage with Billie Joe Armstrong of Green Day, right, and Miranda Lambert. (Brian van der Brug / Los Angeles Times)
Seats are marked and ready at Staples Center. (Brian van der Brug / Los Angeles Times)
Grammy executive producer Ken Ehrlich, left, talks with Neil Portnow, president of the National Academy of Recording Arts and Sciences. (Brian van der Brug / Los Angeles Times)
Grammy executive producer Ken Ehrlich. (Brian van der Brug / Los Angeles Times)
Performers and crew members on stage. (Brian van der Brug / Los Angeles Times)
Miranda Lambert and Billie Joe Armstrong rehearse. (Brian van der Brug / Los Angeles Times)
