Self tan

I wouldn't recommend just doing your arms and shoulders... it might look uneven for the rest of your body showing (chest and neck) and then also take into consideration matching your makeup!

I would suggest a full body tan to make sure everything stays even! You can get a few rounds at some gyms with the light rooms! I haven't used them myself but a few friends of mine do that before going on vacation!

You could try going tanning for a few minutes a couple of times before your wedding. I know people who do this before going on vacation.

I actually just wrote something about this the other day I tried out a Tarte self tanner called Brazilliance Plus and it's amazing. I bought it from Sephora. It is a little bit on the pricier side but it looks so natural on and is very easy to apply.