Um, noise is is generally the effect of having a high ISO on cheapish SLR's, .......
I've gotten noise from my D700, which by the way, is not cheap. My understanding is that (digital) noise is pushing the envelop and an affect of exceeding the dynamic range of your scene. With digital editing it is most likely due to bringing up the shadows from an underexposed shot. Your original is not underexposed, but because of your edits, it rears its ugly head.
I think this Jacki is a perfect example of what we all are guilty of in the early days of editing. Your saturation is over the top and unbelievable TBH. The greens are too green and the yellows are lost because of the boost in contrast. I say this because you have done nothing more than make a decent shot into an unbelievable one. As already mentioned, subtlety is a better route to take.
Either add an "H" or an "A".