Go Go Go!!
Go go go (dirigida hacia un grupo o individual) = vamos vamos vamos/vaya vaya vaya?
1 Answer
I am not a native speaker of Spanish, but my view is if you are telling a person or a group to go you use the imperative 'vaya'. If you use 'vamos' that too can be imperative but is more 'let us go' so you are urging the group to join you in going. Therefore my view is if you as a spectator are saying go, go you use 'vaya' and if you are a participant you use vamos.