Jumpin' J.Lo: The singer's fashion no-no. Photo: John Parra/WireImage.com

The usually glam Jennifer Lopez turned heads (for the wrong reasons) in a poorly fitted denim jumpsuit at the Miami Dolphins game this past Sunday -- which means she's either raided Dolly Parton's closet circa 1976 or hasn't realized that "Hee Haw" is no longer on the air.

Though the Daily Mail claims that the all-in-one outfit "hugged J.Lo's famous curves in all the right places," we think this denim dud illustrates just how tricky the jumpsuit trend can be to pull off (not to mention trying to use the bathroom).

So what do the experts say?

"For winter, jumpsuits are a great way to update your wardrobe and are also perfect for all those lazy dressers -- all you need is a one-piece," says Ashlan Gorse of E! News.

"But sometimes jumpsuits can be very tricky to pull off if you don't get one that fits you right or have the right accessories."

Case in point? Rihanna, who looks "sophisticated and fresh," according to Gorse, thanks to her chic accessories and closed-toe pump. Molly Sims, meanwhile, made a fashion faux pas in her jumpsuit because, as Gorse notes, "her tall model frame is cut off by the wide pants."

We know what you're thinking -- if a supermodel can't work this trend, what chance have the rest of us got?

There, there. StyleList turned to fashion expert Jeannie Mai, host of "How Do I Look?" and correspondent for "Extra," for tips on wearing jumpsuits to perfection.

A flattering version of the jumpsuit, from Black Halo. Photo: Shopbop.com

1. Look for jumpsuits with a blend of spandex or silk. These fabrics are more forgiving to skim the body, and portray a more elegant and fresh appeal than the structured jumpsuits of yesterday.

2. Find a jumpsuit that is thin in fabric so that it doesn't create a boxy shape to your figure, and can be worn layered with pieces for warmth, or decorated with key jewelry and heels for spring.

3. Get professionally fitted for a terrific strapless bra (if needed). Otherwise be sure your bra cups are filled properly by adjusting the straps.

4. Don't buy jumpsuits that are heavy in fabric. Jumpsuits can immediately pack on the pounds if it doesn't skim the body.

5. Have the jumpsuit hemmed with your desired heels on.

6. Purchase a size where the key areas (bust, waist, hips or in the hem) do not bunch or drag.

7. At the same time do not buy jumpsuits that pull or restrict your body from moving! Buying too small could, too, make your figure appear larger.

8. Depending on the weather, jumpsuits can be worn alone or paired with thick cropped jackets to soft dainty cardigans. Add ankle or knee-high boots for warmth, and strappy sandals for summer and spring.

Now that you've mastered the jumpsuit trend, learn how to wear sequins.