What do you think?

I'm having second thoughts about getting a tattoo this week. Not because I'm scared or anything just I was told that if I got a tattoo and then lost weight it could skew the picture. Coz my aim is to lose some weight before my 21st which is in October, and if I was to get a lower back tattoo it could look different by then :-S So whoever reads this blog I'd like your opinion, on whether I should I shouldn't get a tattoo this week or to wait until after my birthday. Much appreciated! :)