Juanes rehearses at the crew fine-tunes. (Robert Gauthier / Los Angeles Times)
A pair of onlookers watches rehearsals. (Robert Gauthier / Los Angeles Times)
Annie Lennox joins Hozier during rehearsals at Staples Center. (Robert Gauthier / Los Angeles Times)
Juanes, flanked by bass player Felipe Navia and guitarist Juan Pablo Daza, at rehearsal. (Robert Gauthier / Los Angeles Times)
Stage sets are put in working order. (Robert Gauthier / Los Angeles Times)
Annie Lennox chats with reporters during rehearsal. (Robert Gauthier / Los Angeles Times)
Actress Pauley Perrette has her photo taken with Annie Lennox backstage at rehearsals. (Robert Gauthier / Los Angeles Times)
