difference between 2 sentences

Hi,

Can you tell me what's difference between "here she goes" and "she is here".

Thanks

here she goes ( it means somthing is starting, kind of a slang phrase, it could mean she is going off on a tangent, it could be masculine, here he goes agin, but depends on context. the phrase could mean alot of things good or bad.

she is here, just mean's that some one is present  could also me masculine he is here, it is just stating that a person's location that they are present and accounted for.

here she goes, it could mean many diffrent things, many songs use the phrase, and it just depends on the context.