The gang prepares for the high school’s annual choral concert.
Donna wonders whether dating Randy is the right thing; Fez tries to impress the ladies.
The CSIs investigate the demise of a famous Cuban singer's sister who's in town as part of a U.S. tour. Meanwhile, Hodges begins to get cold feet at the prospect of marrying his Italian bombshell girlfriend. (TV-14 L, V)
Morgan, Sidle and Finlay try to relax at a forensics conference when a mass shooting occurs on site.
