I was aiming for a heart shape at first, using the studs, but ended up with two floral shapes instead, which works out just as fine :P The studs don't need anything special to stick to the nail, I just use regular top coat to stick them on, and another coat of top coat on top to seal them in. Though, if you reallllly wanted to make sure they didn't come off too easily, you could always use nail glue to cement them in place (:
For the mani's base, I used Chi Chi Don't You Know Who I Am?, and topped it off with a reverse glitter gradient using Shades Of Phoenix Zeus.