How to di this sort of effect.

[kyleweeks522]

I noticed on the second one that there is bokeh used for the out of focus lights in the background. If you don't know bokeh, look it up. Its a lot of explaining.

Bokeh doesn't get "used." It's a characteristic of the lens. You might want to read up on it...

Sorry. The terminology I used made that sound different than I intended. But I do use these occasionally

Amazon.com: Lensbaby Creative Aperture Kit: Camera & Photo

 

[Tstandiford]

That effect can be achieved with any photo editor that does layer modes. I personally use gimp for this.

Simply add a new layer, give it a rainbow gradient, and change the layer mode to color. Also, it looks like you would do well to add a layer mask that is a black to white radial gradient around the subject to remove the color from them, but keep the color around them.

For more information on how layer masks work in gimp check out this gimp video tutorial.
Check out this gimp video tutorial to see layer modes in action.