11 Style Lessons from the Week's Best- and Worst-Dressed Celebrities

Let's start on a positive note. Nick Jonas has transformed into a very good suit-wearer of late, and this tan double-breasted version is the latest entry in his ongoing cavalcade of tailoring. But the best thing about the whole outfit might just be the tee, which keeps things from getting too formal. If you're looking to make a double-breasted suit feel casual, feel free to follow (ahem) suit.

And now, a low note: Robert Downey Jr. looks like he time-traveled here from a near-future dystopia where everyone dresses like the early 2000s, but somehow makes it even worse. If you were wondering whether you can pull off the "casual newsboy cap and satchel" look, here's proof that neither you nor I nor anyone else can do it.

Seriously, what is it with A-list actors and terrible hats? We know that this is Leo's signature look, and that his approach to style is basically "IDGAF." But you should GAF, and you should definitely not wear this hat. (He looks pretty good otherwise, though.)

Ye likes to play with proportion in his clothing, and a lot of times he gets it right. But the trick is creating a sense balance, which this outfit doesn't have. That billowy, oversized jacket absolutely swallows his top half. He looks like he might tip over at any moment.

His outfit isn't the least bit complicated—jeans, tee, boots, lightweight jacket—and that's what's so great about it. When in doubt, you can never go wrong with well-cut basics in a range of neutral colors.

Jonas's tailoring game was on point this week, but his matching game was...well, actually, it was a little too on point. Check out how the storm flap on his leather bomber exactly matches the print on his shirt. A little gimmicky, no? At least everything fits him well. Points for that.

A big, bright print can look pretty good under the right circumstances. But as you can see from this photo, under the wrong circumstances, things go off the rails pretty damn fast.

Be honest. Which do you notice first: Ronaldo's artfully layered sweater-and-jacket combo, or those flashy gold earphones? Remember to choose your accessories wisely.

Denim-on-denim can be done, but it can also be tricky. The shades here are just a little too close to one another, which is compounded by the extensive distressing on both the shirt and the jeans. (The hat, in a similar color, doesn't help the situation.)

A friendly reminder that a bizarre pair of shoes will do a very good job of distracting everyone from the rest of your outfit. In Bon Jovi's case, he might just be trying to divert attention away from that hat.

Ladies and gentlemen: irrefutable proof of the power of a great T-shirt-and-jeans combo.