Yup, they got the memo. Stars showed up at the Grammys Sunday night at the Staples Center in L.A. more prim and proper than we’ve seen them in recent memory. You can thank a leaked email last week from CBS’s standards and practices committee advising attendees to go covered up or go home.

They listened. With all the pant suits, hidden décolletage, dapper tuxedos ( Drake: hello, handsome!), the red carpet looked more like a corporate fundraiser in Washington, D.C. But on the music industry’s biggest night out, a few did their part to nab the spotlight.

Best

Kelly Rowland: The Destiny’s Child member, who no doubt gained new fans with her electric Super Bowl performance, skated by the rules in a black peekaboo Georges Chakra Couture that really did her justice. “I respect, I wore clothes!” Rowland, who turned 32 Monday, joked.

Rihanna: We’ve probably seen as much of her anatomy as Chris Brown has, so her elegant, flouncy Azzedine Alaia wrap dress was a pleasant change.

Beyonce: The headliner maker toned things down in a streamlined pants ensemble by Osman.

Taylor Swift: Though the country darling acted her age (23) by mocking ex Harry Styles before launching into We Are Never Ever Getting Back Together, Swift was all woman in her ivory Grecian J Mendel gown.

Tim McGraw: The country hottie never finds himself on any worst dressed list. You can’t go wrong in all black Tom Ford. His best accessory: not his ever-present cowboy hat but wife Faith Hill, who sported braces (“Wear your retainer!” she advised the kids at home).

Wiz Khalifa: The dad to be, who told E!’s Giuliana Rancic that he wants his girlfriend Amber Rose (in Donna Karan) to “stay pregnant forever,” went all Rat Packer in a white tux, also by Tom Ford.

Carrie Underwood: Her Roberto Cavalli mermaid dress was a little too Goth, but she got points for that drop-dead gorgeous diamond Johnathon Arndt necklace worth a cool $31 mil.

Estelle: The Londoner has the body to carry off that fishtailed Genelle Brooks x Love Collins number, and that tribal print was trippy. Cheers to taking risks and having them pay off.

Worst

Sean Paul: The Jamaican reggae star’s mismatched, too-casual Viktor & Rolf ensemble didn’t make the cut. P.S. Chill out on the hardware, mon!

Katy Perry: The Wide Awake cutie told Ryan Seacrest she was channeling Priscilla Presley busting out in her jewel encrusted, mint colored Gucci. We think the ex Mrs Elvis would beg to differ.

Florence Welch: In the What Was She Thinking category: Welch’s Givenchy by Riccardo Tisci green gown featured visually unappealing spikes reminiscent of an armored dinosaur. “I’m very, very lucky to have this custom made for me,” the Sweet Nothing singer told Rancic, who was at a rare loss for words.

Adele: Instead of embracing her curves, the new mom covered them up in this tablecloth-y Valentino. For shame!

Janelle Monae: “I’m wearing ideas,” the We Are Young princess uttered on the red carpet. Oh, that’s what you call this Little Drummer Boy get-up: an Against Nature vest and puffy shirt, Moschino jacket and Ralph Lauren hat.

Bruno Mars: Calling the alterations department: The slacks were too short on an otherwise impressive gray suit by Thom Browne.

Jennifer Lopez: Why in the world would a bona-fide style arbiter want to copy Angelina Jolie’s been-there, flaunted-that look? The thigh-high Anthony Vaccarello was not one of your best choices, J.Lo. Please explain.

Follow the writer at www.twitter.com/madeleinemarr