you may see some music news on the tv about some singer. when you play there song do you tell the audience the news just over the music. i do if it is good interesting news and sometimes people come up and want to know more

its pretty kool

nope, never, i just leave that up to the radio DJ's

it depends on the song...
the reason i say this is because, that if it is a really brand new song announce it at the end during the last 10seconds of the Song playing time.

i reccomend you not to do this more that 2 times.
you'll start to annoy some people. (Ignorent People)