I found this from gossipcandy.com, the poster mentioned Adam's customised pendant in it.
I don't know whether you guys know if it, but here's a picture of it;


The three signs are (in order) his sun sign (Aquarius), moon sign (Libra) and his rising sign (Aries).

And since I've always been into Astrology, I looked mine up, and mine are Aquarius, Cancer & Aries respectively.
How awesome

If you want to look yours up, just click.