The Un-Healthy Obsession

Have any of you seen this absolutely adorable dress from Modcloth?  I have to admit to a love affair with this dress that is bordering on obsession.  I mean polka dots and sundaes on the same fabric - it is so cute - it should be a crime!  However, the dress has a slightly steep price tag for such a simple silhouette.

My creativity started flowing and I found the fabric below.  Which I also found out comes in white with the blue polka dots.  Part of me wants to go out and snag this fabric as fast as I can!  But then, it isn't the same cute pink from above and then I start to think why a 30 year old woman wants to be wearing ice cream sundaes.  Am I too old for cute?

What do you think?  Would you go for the dress or go for one of the fabric selections OR possibly say no all together?