Stars whose boobs have lives of their own (get back in that dress you naughty nipple!)

It’s always embarrassing when a star endures a celebrity nipple slip.

Strangely, in the world of showbiz, some individuals seem to ‘accidentally’ expose their celebrity boobs all the time. Their chests have a life of their own (back in your bra, boys, I’m not going to tell you again!).

Lily Allen, Jennifer Aniston and Pamela Anderson have all revealed a bit of celebrity nipple through their outfits more than once. And with Lady Gaga’s wild fashion sense, it’s no wonder she’s a repeat offender and primed to win Exhibitionist Of The Decade.

Sometimes celebrity boobs escape when a statement red carpet dress falls the wrong way. In other cases, singers’ bosoms play peek-a-boo during energetic on-stage performances. Skintight gym-wear can also leave nothing to the imagination.

It’s always awkward when celebs go braless and genuinely forget about those all-seeing flashbulbs following them around. Bright cameras and a sheer top reveal a whole lot of celebrity nipple.

Then there are stars like Rihanna. In mesh T-shirts, see-through outfits and barely-there dresses, the Bajan singer obviously wants everyone to clock her assets. (Rihanna has her breasts out again? Really? Yawn.)

Denise Welch went full-frontal in the Celebrity Big Brother house in 2012 (cringe) and hot Blurred Lines model Emily Ratajkowksi often strips off for saucy photos on her Instagram page. We want a body like hers!

Actress Helen Flanagan is especially proud of her celebrity boobs and has given followers a good glimpse of them on her social networking sites countless times.

Poor Michelle Keegan was victim of a prank in April 2013 when a cheeky pal uploaded an Instagram photo of a woman – whose face isn’t visible – posing topless in the bath.

Michelle denied that the impressive cleavage belonged to her, leaving fans pretty disappointed.

However, it isn’t just chest-confident celebs who’ve displayed more than necessary in public. On 10 November 2005, Keira Knightley’s strapless red dress showed a bit too much flesh at the New York premiere of Pride And Prejudice.

Then just 20, perhaps the London girl hadn’t yet learnt the importance of tit tape. Luckily, she still looked gorgeous with a chic up-do, statement bejewelled drop earrings and super-smoky eye make-up.

In August 2014 Keira went topless for a magazine shoot so she’s become very comfortable with baring her chest.

SEE PICTURES Now’s top sexy celebrity boobs

SEE PICTURES Helen Flanagan’s sexy selfies: The soap star’s hot Instagram pictures

SEE PICTURES Emily Ratajkowski is beautiful topless