I want to know the meaning of closeted and vociferous in the following sentence.?

Question

His vociferous opinions on closeted stars strike fear into the hearts of Hollywood publicists.

Answer 1

closeted-functioning in private; secret;

vociferous-loud, noisy, vocal, uproarious, boisterous

Answer 2

You have voice in vociferous, voiced alot, loud in the sense of heard around like on TV. The closeted stars are in the closet as to something they don't want known and the gossip columnist is publishing it in print, media or just on the street, at parties or just out to the general public.