Pronouns and the imperative

[dzhozef-derfler.livejournal.com]

In many songs, I've seen a pronoun followed by an imperative verb. Does this change the meaning of the phrase, such as making the pronoun and word of direct address? Or does it change how the verb is read?
Here are brief examples (from songs* I like):
А ты вспомнимай меня...
Ты не люби его.
Ты не верь им.
Ты это знай.
Ты не отпускай.


*And those are all by the same artist, but I won't name her. According to a friend of mine, she mispronounces things and disliked by quite a few. This is, of course, from the same friend that absolutely despises the singer. If you recognize the songs/lyrics and don't like the singer, then please just pretend they are made up example sentences. In no way am I intending to use people to do something against their will. I just want to know how the phrases work so I can translate the songs on my own...

Thank you!
**EDIT: At some point, I changed the font size, and it screwed up the rest of the journal. That's why some words are bigger than others...**