The Grammys and CBS are gonna be fuming at Rihanna! During a performance in tribute to Bob Marley at the Grammys on Sunday, Feb. 10, Rihanna’s sexy, skimpy outfit revealed WAY more than the ‘Wardrobe Advisory’ permitted — everyone watching got a peek of her under boob!

Rihanna’s Revealing Outfit

You were probably a little surprised when Rihanna’s performance of “Stay” went on without a single hit of overly sexual antics. Well, fear not — she was saving it for Bob Marley. RiRi’s two-piece sequined outfit barely covered her boobs — and we mean barely — and didn’t leave much to the imagination.

For the first part of her singing Bob Marley’s “Could You Be Loved,” we were getting lots of sneak peeks of her infamous Goddess Isis tattoo, under her breasts, and then we saw it — RiRi’s under boob!

The tribute also featured Bruno Mars, Sting, and Bob’s sons Ziggy and Damian.

Okay, we admit it — we were silly to assume that Rihanna wouldn’t make some noise on Grammy night.

Rihanna Ignores CBS’ Dress Code

The under boob is sure to send Grammys and CBS execs up the wall. Only days before Grammy night, CBS released a “Wardrobe Advisory” warning musicians and performers to avoid any revealing outfits. The advisory, among other things, stated, “Thong type costumes are problematic. Please avoid exposing bare fleshy under curves of the buttocks and buttock crack. Bare sides or under curvature of the breasts is also problematic.”

Sorry, CBS, we were definitely seeing some breast curvature during that performance!

Did you catch it, HollywoodLifers?

WATCH: Grammys Red Carpet Recap, Katy Perry’s Epic Cleavage & More!

– Andrew Gruttadaro

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Anne Hathaway, 30, usually looks elegant and regal but on Dec. 10, at the Les Miserables premiere in New York City, she had a wardrobe malfunction of epic proportions! She went commando and gave photographers quite the eyeful as she got out of her car!

Anne is being praised for the Tom Ford gown she wore at the Ziegfeld Theatre, but most people are more focused on what happened just before she hit the red carpet!

Poor Anne left nothing to the imagination – photographers got a full up-skirt shot and Anne wasn’t wearing any underwear!

NY Daily News is reporting that they overheard Anne talking to Vanity Fair writer Ingrid Sischy at a lunch on Dec. 11.

“I was getting out of the car and my dress was so tight that I didn’t realize it until I saw all the photographers’ flashes. It was devastating. They saw everything. I might as well have lifted up my skirt for them.”

A source close to Anne tells HollywoodLife.com EXCLUSIVELY that she is “temporarily horrified but now is dealing with the situation as something that will pass and be forgotten.”

“She didn’t wear underwear because it affected the wear of the dress,” our source added. No VPLs here, that’s for sure!

Anne recently spoke to our sister site Deadline.com about the thrill of singing on camera in Les Miserables:

“I found it liberating to sing on camera. On stage, you have to indicate having a thought, and the word you are singing must indicate it as well, but on camera, you can have ideas, you can take in all the stimuli that the character would be taking in, there’s a freedom you get, and you don’t have the obligation to transmit each idea to the back of the house. It felt so much closer to reality for me.”

Do YOU think Anne should be embarrassed, HollywoodLifers?

WATCH: Les Miserables – Official Trailer

More Wardrobe Malfunctions:

1. 2012′s Most Shocking Wardrobe Malfunctions — Kim Kardashian & More
2. Robert Pattinson’s Fly Is Down & More Shocking Celebrity Wardrobe Malfunctions
3. Kim Kardashian’s 2 Wardrobe Malfunctions Draw Attention To Her Infamous Backside

Jennifer Lopez‘s low cut stage outfits have caught up with her! The singer has suffered multiple nip slips in the past two weeks — poor J. Lo!

This time, Jennifer was performing during her Dance Again World Tour at the O2 Arena in London, England.

Even huge stars like Jennifer are not immune to embarrassing wardrobe malfunctions. She reportedly suffered a slip during the 2012 Academy Awards, although she denies it. And on Oct. 11, Jennifer flashed her SPANX on stage!

Should Jennifer get new stage outfits, HollywoodLifers?

More Jennifer Lopez News:

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2. Jennifer Lopez Shows Off 3 Looks In 1 Day At Paris Fashion Week
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Katy Perry is known for her crazy get-ups, but at first glance the star looked very cool and composed in a seafoam green frock in Paris on Mar. 1, pairing it with a coral bag and her rather new blue ‘do. While her look was definitely toned down for Katy, the star actually managed to cause quite a stir with her very revealing sheer skirt, which led to quite the wardrobe malfunction — her underwear was totally visible! Sheer may be a popular trend, but if you want to work the look you have to be careful!

While Katy isn’t the first star to fall victim to a wardrobe malfunction, (especially one involving a sheer get-up), we’re glad she opted for appropriate undergarments! The star was so smart to cover up in this seriously sheer look. With that being said, if you want to work the sheer trend I think it’s best to try the look on top, either with sheer sleeves or a sheer panel on the back of a shirt or on the sides, so that you’re appropriately covered.

We doubt Katy wanted to show off as much as she did, but a valuable lesson can be taken away from Katy’s mistake — make sure you wear the appropriate undergarments underneath your clothes, so in the event that you fall victim to a wardrobe malfunction you’re totally covered!

What do you think of Katy’s sheer slip-up?

Katrina Mitzeliotis

Follow @katrinacm

Oops, she did it again! Britney Spears was the victim of a major wardrobe malfunction today as she was leaving The Sanctum Soho Hotel in London, where she’s currently promoting her upcoming European The Femme Fatale Tour. As she was climbing into her car, she gave us a big old crotch shot!

The 29-year-old international pop star is no stranger to wardrobe malfunctions, however, this is her biggest one of late. Sporting a lime green mini dress, Brit was getting into her car and didn’t close her legs fully — showing off some pink neon cheetah panties. Oops!

Watch: Britney Spears Shows Her Butt At Kids Soccer Game 

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Alright, it happens to the best of us — jeans a little loose, underwear out! But this is definitely a bad case of the maternity wardrobe malfunction! It’s up there with Taylor Swift‘s infamous Spanx-slip on stage! Eek!

Jennifer Garner, 39, who is expecting her third child with Ben Affleck, was bending down to lift her 5-year-old daughter Violet onto a plane when her hot pink thong slipped out of the top of her jeans!

And if that wasn’t embarrassing enough on it’s own, a male escort caught the whole incident, not to mention the paparazzi!

Jen, make sure you buy the right jean size — we know your a pregnant mom-of-two, but comfort isn’t the only thing that matters. Make sure your pants are snug enough to cover up those undies!

–Leigh Blickley

More Malfunctions:

1. Vanessa Hudgens’ Sheer Dress, Three Mega Nipplegates & More! Which Celeb Had The Worst Wardrobe Malfunction?
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3. aylor Swift Talks About Her Infamous Wardrobe Malfunction For The First Time!

Wardrobe malfunctions are becoming an epidemic, and the latest victim to have rebellious undergarments was sultry singer Kelly Rowland. While performing onstage at club in New Jersey on Sunday, Aug. 7, Kelly’s barely there bra slipped up and flashed her fans her goodies!

“New Jersey crowd was amazing!! hope you enjoyed the show and didn’t mind the peekaboo LOL!!! #kanyeshrug #stuffhappens,” tweeted Kelly after the show.

Fortunately, Kelly was able to handle her accidental bare breast exposure with grace and humor. But with all these celebrities making their private parts public, people are starting to wonder if nudity is becoming less of a taboo? It seems like every day there is a new wardrobe malfunction offender, but celebrities are still donning their risky and risque wardrobes.

Tell us what YOU Hollywoodlifers? Are you sick of seeing celebrities flash their fans? Or is a little nationally-viewed nakedness really #nobigdeal?

Nicole Fukuoka

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