I completely trust your sense of dress appropriateness…which brings me to this question: would something similar to this shorts-and-cropped-jacket combo be appropriate to wear to a wedding? I'm a huge fan of the slightly sexy/brattiness of dressy shorts but I'm unsure how appropriate they would be at a fairly traditional 3:00PM church ceremony and 5:00PM country club reception.
I don't need a more in-detail explanation of what you mean by "fairly traditional," I don't need to know whether you're considering ballet flats or stilettos, and honestly, I don't even need to know what your figure looks like, because regardless of your responses, the first word out of my mouth would remain a resounding "NO."
I'm not trying to be harsh or hyperbolic, but wearing shorts - booty, city, university or Bermuda - to even the most casual wedding ceremony runs contrary to every tenet of venue-appropriate dress I've tried to impart in the last seven months.
Though I avoid them at all costs for reasons relating to panic attacks, chills and sudden bouts of claustrophobia, I do know and accept the fact that weddings are occasions when the guests must not, out of respect for the bride, draw egregious attention to themselves. This means no wearing white, no excessive cleavage, no mini dresses, no discussion about how this is likely the last time you'll see your girlfriend in a social situation, no shotgunning beers at the reception to lament that fact and certainly no short shorts.
The outfit to which you linked me (pictured above) is adorable, especially that 3/4-sleeve bolero, but no matter how dressy or church-appropriate the above-the-waist components happen to be, those shorts will vitiate all your good effort in one fell three-inch-inseamed swoop. Yeah, they're blousy, yeah, they're pricey, and yeah, they're not that short, but still, at the end of the long, long "heartwarming" day, they're still too casual.
If you're not into skirts or dresses, but you're also on several late Summer, early Autumn wedding rosters, your only option is a pair of lightweight trousers. Were I you, I'd get that bolero, complement it with some high-waisted black trousers, a feminine, tuck-in-able ivory blouse and a pair of polished slingbacks. The best part of this ensemble, better even than the feeling you'll get slipping through the don't-look-better-than-the-bride loophole, is that all these components - the jacket, the pants, the top and the pumps - are versatile staples that can be worn again and again in not only formal but professional and casual venues as well.
Buy the shorts, too, but wear them with cute flats during the day or with heels later in the night. Just please, keep them away from the chapel.