When celebrity bikinis misbehave

Flashing the flesh ... Lindsay Lohan, Katy Perry and Rihanna suffer swimwear mishaps

KATY Perry hit a bum note on holiday this week - when her naughty bikini bottoms went on the slide as she flew down a flume.

Clutching a billboard while she readjusted her swimmers, the star giggled over the cheeky reveal.
And she's not the only star who struggles to find swimwear that will stay put.
From Rihanna to Lindsay Lohan, these big names should give their misbehaving two-pieces a stern talking to.

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Coco Austin

Tiny ... Coco squeezes into a too-small two-piece

Flynet

This pretty floral number is not so much misbehaving as simply failing to cope with its heavy workload.
Classy Coco wears a bikini fit for the less, erm, ample woman...with the inevitable result.

Rihanna

Bid for freedom ... Ri-Ri's left boob gets all independent on her

Splash

When it comes to finding swimwear that's up to the task of an ocean dip, Ri-Ri is Man Down.
The poor lass's left boob went on its own trip during some beach time in Barebados.

Lindsay Lohan

Lo points ... Lindsay reveals more than she bargained for

INF

Lindsay recently spent ages stocking up on accessories in Claire's but appears to have forgotten her bikini's needs entirely.
No wonder the end result was a LiLo thrill in this saucy surf shot.

Maria Fowler

Hanging low ... Maria's bikini top needs a raise

Magic Moments

We have one word for TOWIE star Maria's pink bikini: lazy.
All those layers clearly clubbed together and decided they couldn't be bothered any more. That's what you get with cheap frills.

Michelle Rodriguez

Cheeky ... Michelle Rodriguez struggles to cover up in Cannes

BIG

When it comes to bikini bots that don't slip after a dip, some celebs just can't get the staff.
Here Michelle has Lost the battle to keep her dignity after flimsy side-ties prove her undoing in Cannes. More like Cannot.

Paris Hilton

Giggles ... Paris laughs off a bikini malfunction

BIGPICTURESPHOTO.COM.

Bless Paris Hilton for making the breast of this naughty nipple slip by laughing it off.
Even an heiress with less in the cleavage department struggles to stay covered when a wilful bikini has a mind to wander.

Heidi Montag

Give her a big hand ... Heidi improvises on the beach

Pacific Coast News

When you're stuck with an unsuitable swimsuit, it's always best to have a back-up plan.
Here reality star Heidi Montag copes with a right handful as her top takes a dive in Malibu.

Courteney Cox

Child's play ... Coco Cox Arquette giggles as she flashes one of her mum's boobs

Matrix

Even the best-behaved bikinis can come a cropper, in the right hands.
Here happy-strapper Coco Cox Arquette plays peekaboob with her mum, Courteney Cox.

Aubrey O'Day

Adjustment ... Aubrey rearranages her best assets

Splash

That knowing smile suggests attention-seeker Aubrey is in league with her errant bikini top.
Between them they've created quite an eyeful for the viewing public.

Serena Williams

Popping out ... Serena falls out of her blue swimsuit

Islandpaps / Splash News

Tennis champ Serena has a netty but nice time at the seeside - with a rogue breast-revealing swimsuit.