Images for social media

[Chunkford]

I've been creating little images that I plan to place on my facebook page with the intention of making them go viral.
But I'm conscious that some images will need to be brought from a stock photo company.

I've tracked them down but I'm confused over what licence I need for this.
Can anyone here shed some light on the subject?

[JasonD]

Worry about it later and do it now licence

[Chunkford]

lol, noted