I wanted to ask if anyone tried any skin lightening shots. I want to find out if it gives permanent results and how long it takes to see results.

I want to lighten my whole body to get to Rihanna's color. I have a dark brown complextion and a very uneven skin tone.

I don't think the lightening lotions work, So I want to try the shots.
Ive be browsing the internet for 2 days trying to find out how to lighten my skin.
I don't have that much longer before prom and Im trying to look completely different.

Someone Please Help Me Find Something That Works!