Thank you for your question, Mr. Shakespeare, when’s the wedding?
Seriously, and in my humble opinion, no tan is best. Putting it nicely, wedding dresses and tans don’t mix, and a bride can run the risk of looking like she went on the honeymoon first. Putting it not-so-nicely, a tan contrasted with your white or ivory dress can make you look—sorry—tacky. Embracing your natural skin tone will be the most flattering to you, your really expensive dress and the photos.
That said, if you must tan, a spray tan is certainly safest, but applying it without streaking takes experimentation with different formulas (to find the best color for your skin) and of course, practice. Blend like crazy and use a cosmetic wedge sponge to do your face, hands and feet. Do your final application at least two days before the wedding.
If you are throwing all caution to the wind, just be sure not to go to the tanning salon or the beach the day before the wedding. A sunburn could easily ruin your special day. And wear a strapless bathing suit to avoid tan lines, which are difficult to cover with make-up.