Grammy Awards

Under the watchful eye of CBS censors, Rihanna kept her lovely girls barely covered in a blood red gown at the Grammy Awards on Sunday.

With no sign of poor Michelle Williams ... Beyonce and Kelly Rowland both made appearances on the Grammy Awards red carpet.

While Bey kept it movie night casual in pants, Kelly went all out in a body-baring gown.

The question is ...

Despite his injured hand from his recent fight with Chris Brown, Frank Ocean was all smiles at the Grammy Awards on Sunday.

The CBS censors can rest, porn diva Jenna Jameson -- with her blonde Miley/P!nk weave -- kept all of her XXX lady bits covered in a demure gold foil gown at the Grammy Awards on Sunday.

While there's no word why the hell she's at the Grammys, Jenna is known for her amazing oral skills.

CBS fashion censorship memos be damned, her highness Jennifer Lopez showed up to the Grammys with a very high cut gown that showed off her gorgeous Jolie leg and then some.

Doing her best Mrs. Roper impersonation, Adele looked gorgeous in a red floral tapestry at the Grammys on Sunday.

At least it's different from her usual shapeless black ensembles, right?

Fresh from wrecking his car yesterday, Chris Brown showed up the Grammys -- without Rihanna at his side -- and proved he's got a lot of nerve ... to wear an all white suit.

Looking dapper as usual, Justin Timberlake arrived to the Grammys on Sunday wearing .... drum roll ... a suit and tie. Well, a bow tie actually.

And you thought the sexyback jokes were endless.

Whitney Houston's brother and sister-in-law arrived in Los Angeles yesterday to attend Clive Davis' big pre-Grammy bash ... a bash Whitney's mom called "obscene."

Whitney's mother Cissy slammed Davis' invite, saying, "I got an invitation to the party, which is the most obscene thing. I don't know why they would want me to come to the party in which she died, you know? I guess maybe he just sent me a copy for remembrance sake."

Whitney's brother Gary -- along with his wife Pat (who was also Houston's manager) -- begged to differ and flew into LAX Saturday, telling us they were going to "support Clive."

CBS has put the screws to the fashion risk takers who want to show some skin at tonight's Grammys. Now that the memo is out, musicians now must decide whether to dial back. So we gotta ask ...

With the 2013 Grammy Awards just hours away, take a trip back in time and check out the best and worst looks from last year's red carpet.

With CBS trying to put the kibosh on everyone's favorite genital revealing outfits at the Grammys this year, who can forget the two visionary pop divas that helped ignite the NC-17 overexposed lady bits chic craze: Jennifer Lopez in her infamous plunging Versace poolside coverup back in 2000 -- and Toni Braxton's Caligula-era torn sheet dress thing from 2001.

Question is ...

Stevie Wonder says he totally backs CBS' push to ban risque clothing from The Grammys ... then again, he really doesn't know what he's missing!!!

Wonder was leaving The Sayers Club in L.A. last night when we asked about the network's email to the stars -- urging them to cover up their butt cracks, boobs and special no-no places for Sunday's big show.

Stevie told us he completely understands CBS' anti-skin efforts ... saying, "Children watch it too, ya know?"

CBS doesn't want to see a SINGLE celebrity butt crack at the Grammys on Sunday ... and no boobs or genitals either ... this according to a warning the network fired off to all "talent" appearing on the show.

The email -- which surfaced online -- was sent by CBS Standards and Practices to people connected to the celebrities who are expected to appear on camera during the broadcast ... and the network makes it clear, it's not taking any chances with the FCC this year.

"Please be sure that buttocks and female breasts are adequately covered," the letter reads.

"Thong type costumes are problematic. Please avoid exposing bare fleshy under curves of the buttocks and buttock crack."

It goes on ... "Bare sides or under curvature of the breasts is also problematic. Please avoid sheer see-through clothing that could possibly expose female breast nipples."

"Please be sure the genital region is adequately covered so that there is no visible 'puffy' bare skin exposure. Please avoid commercial identification of actual brand name products on T-shirts."

"Foreign language on wardrobe will need to be cleared. OBSCENITY OR PARTIALLY SEEN OBSCENITY ON WARDROBE IS UNACCEPTABLE FOR BROADCAST. This as well, pertains to audience members that appear on camera.'

So, a star can wear a pink ribbon ... as long as it doesn't say "The American Breast Cancer Foundation."

We reached out to CBS -- so far, no word back.

Justin Bieber deserved at least ONE Grammy nomination this year for his hard work ... but no ... he got shafted by the uppity snobs at the Recording Academy -- so says Simon Cowell.

Simon was out in L.A. Thursday night -- for the launch of his new X Headphones -- when we asked about Bieber's Grammy snub. He told us, "You know what? He deserved one [nomination], I think. But they can get a bit snobby sometimes."

But Simon's not worried about the Biebs, adding, "He won't be crying too much. He's doing fine."