PICTURE EXCLUSIVE: Kate Moss flashes her pert posterior in tiny mini dress as she enjoys a-list lunch with Katy Perry, Orlando Bloom and Kate Hudson in the Alps

By Joanna Crawley For Mailonline

Published: 18:20 EST, 17 May 2016 | Updated: 02:16 EST, 18 May 2016

She's been partying up a storm since touching down in Cannes this week.

And on Tuesday Kate Moss moved the party north to Saint Paul de Vence, joining Kate Hudson, Katy Perry and Orlando Bloom for a star-studded lunch.

The Brit model dressed for the sun in a tiny black mini dress, which flashed her derriere as she left restaurant La Colombe d'Or.

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A-list lunch: Kate Moss moved the party north to Saint Paul de Vence, joining Kate Hudson, Katy Perry and Orlando Bloom for a star-studded lunch at La Colombe d'Or

A-list lunch: Kate Moss moved the party north to Saint Paul de Vence, joining Kate Hudson, Katy Perry and Orlando Bloom for a star-studded lunch at La Colombe d'Or

Kate, 42, chose a low-key black suede dress for her starry lunch date, but stood out thanks to the very skimpy cut.

 The long-sleeved black number rode up the top model's legs, flashing a glimpse of her pert posterior,

The low cut neckline ensured there was plenty of skin on show in front too.

Skimpy! The Brit model dressed for the sun in a tiny black mini dress, which flashed her derriere as she left the famous eatery 

Skimpy! The Brit model dressed for the sun in a tiny black mini dress, which flashed her derriere as she left the famous eatery 

Kate added a pair of cute block heel Mary-Janes to her look and kept cool with shades, while her blonde locks were swept back into an effortless up do.

The Brit beauty had some a-list lunch companions as she shared a table with couple Orlando and Katy as well as Kate Hudson and Dasha Zukhova, the wife of billionaire Russian oligarch Roman Abramovich.

Kate looked in great spirits, flashing a big smile as she left the meal, which came the day after she was seen hitting the dance floor at the Chopard Wild party in Cannes on Monday night with her half-sister Lottie, 18, 

Dressing for the weather: The low cut neckline ensured there was plenty of skin on show in front too

Dressing for the weather: The low cut neckline ensured there was plenty of skin on show in front too

Casual look: Kate added a pair of cute block heel Mary-Janes to her look and kept cool with shades, while her blonde locks were swept back into an effortless up do
Casual look: Kate added a pair of cute block heel Mary-Janes to her look and kept cool with shades, while her blonde locks were swept back into an effortless up do

Casual look: Kate added a pair of cute block heel Mary-Janes to her look and kept cool with shades, while her blonde locks were swept back into an effortless up do

The supermodel's arrival in Cannes comes after she allegedly kicked out her toyboy lover Count Nikolai von Bismarck and ordered him to go to rehab.

Kate is said to have had enough of her 29-year-old lover's debauched ways and sent him packing from her country home after 'erratic' behaviour during a week away in the Cotswolds.

The Croydon-born clotheshorse, who has had her fair share of bad boy lovers in the past, has growing concern for her boyfriend and it is believed he has been shipped off to a rehab clinic.

Good to see you! Kate gave one pal a warm goodbye after her fun lunch in the Alps

Good to see you! Kate gave one pal a warm goodbye after her fun lunch in the Alps

VIP table: The Brit beauty had some a-list lunch companions as she shared a table with couple Orlando and Katy as well as Kate Hudson and Dasha Zukhova, the wife of billionaire Russian oligarch Roman Abramovich

VIP table: The Brit beauty had some a-list lunch companions as she shared a table with couple Orlando and Katy as well as Kate Hudson and Dasha Zukhova, the wife of billionaire Russian oligarch Roman Abramovich

The pair started dating after Kate split from her musician husband Jamie Hince, 47, last July, and since then they have been seen enjoying a holiday together in Brazil.

A source said: 'Nikolai was acting a bit crazy in the Cotswolds and it has brought everything to a head.

'She wants him sorted out. Nikolai does not look great at the moment, he looks generally the worse for wear and his face is a bit bloated.

'There are definitely problems which he will have to sort out or they will be over. Friends have warned him that he will lose Kate if he doesn't change.' 

Good spirits: Kate looked in a great mood despite reports that she recently kicked out her toyboy lover Count Nikolai von Bismarck and ordered him to go to rehab

Good spirits: Kate looked in a great mood despite reports that she recently kicked out her toyboy lover Count Nikolai von Bismarck and ordered him to go to rehab

Party time: The model has been enjoying some time at the Cannes Film Festival this week with pals

Party time: The model has been enjoying some time at the Cannes Film Festival this week with pals

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