We did this at our July stamp class along with the other butterfly card I posted a few days back.
Basically, we used three rectangle pieces of designer paper. We punched the butterflies, using the SU butterfly punch, at the very end of the pieces.
Then we adhered the rectangles to the top of the card and the butterflies just below them. We attached a brad (or you could use some jewels or pearls) to the middle of the butterflies and then stamped a sentiment.
Again...can I say EASY???
Enjoy your day!!!