Let's go, Let go

Let me show you two phases, let's go and let go (one with 's and the other without 's).

let's go ( let's do something) used to make suggestion to go somewhere.
let's go to work.
let's go, shall we? ( shall we go? or shall we?)

let go/let go of something = release, as from one's grip (from wordweb dictionary http://wordweb.info/ it is free)

- let go of something
- let go of me
- don't let go of me
- let go of my hand