All partied out? Bleary-eyed Pixie Lott puts in a glitzy appearance at M&S Summer Ball after a week of late nights in Cannes with beau Oliver Cheshire

By Becky Freeth for MailOnline

Published: 02:36 EST, 18 May 2016 | Updated: 09:26 EST, 18 May 2016

From Cannes to Buckingham Palace, Pixie Lott is coming to the end of a week of hard-partying - and she's understandably worn out.

The musician left M&S Summer Ball looking a little bleary-eyed on Tuesday night, as she and her boyfriend Oliver Cheshire made it a fourth late evening in a row.

Pixie's perm was loose and a little disheveled, though her glitzy silver ballgown helped her to maintain an air of elegance on leaving London's Old Billingsgate Hall in the early hours. 

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Tired yet? Pixie Lott proved that five nights on the trot had taken its toll by Tuesday as she left M&S Summer Ball with Oliver Cheshire looking tired

Tired yet? Pixie Lott proved that five nights on the trot had taken its toll by Tuesday as she left M&S Summer Ball with Oliver Cheshire looking tired

Pixie and Oliver arrived back from the glamorous Cannes Film Festival on Monday, but they still haven't come up for air. 

Supportive girlfriend Pixie sharpened up to accompany M&S model Oliver to the high street giant's annual summer bash.

Representing the retailer with his stand-out good looks, Oliver looked slick in a bow tie and black suit with satin lapels. 

Time for bed: Pixie and Oliver partied at Old Billingsgate Hall in aid of Breast Cancer Research

Time for bed: Pixie and Oliver partied at Old Billingsgate Hall in aid of Breast Cancer Research

Good night: She caught up with her boyfriend and latched onto his arm as they were pictured leaving yet another party

Good night: She caught up with her boyfriend and latched onto his arm as they were pictured leaving yet another party

Even in towering heels, Pixie was in hot pursuit of the model and managed to catch up, latch onto his arm and smile on command as they were pictured leaving, together.

She created an hourglass illusion with her lithe figure in a cutaway dress that featured sheer side panels and sequins from top to toe.

It was yet another high profile appearance on what's been a week boasting an embarrassment of riches on the invites front. 

Slick: Pixie looked glitzy in a silver frock while M&S model Oliver was sharp in a tuxe

Slick: Pixie looked glitzy in a silver frock while M&S model Oliver was sharp in a tuxe

Fourth night out: The duo made it a fourth late night in a row

Fourth night out: The duo made it a fourth late night in a row

Pixie bagged the hottest ticket in town on Tuesday afternoon, as she jetted back into the UK just in time for The Prince's trust's 40th anniversary at Buckingham Palace.

Only the previous evening, the popstar joined the A-listers at the Chopard Wild Party in Cannes and preceding that the duo were on the red carpet.

The duo couldn't quite believe their luck, it seemed, because they spent time snapping selfies as they followed Hollywood heavyweights into the Palais des Festivals for the Land Of The Moon premiere.

In fact, just hours after touching down in Nice on Saturday morning, Oliver and Pixie were dressed in their finery for a bash at Annabel's on the French Riviera. 

Jet-setting: They were in Cannes between Saturday and Monday but made it back just in time for more late night appearances

Jet-setting: They were in Cannes between Saturday and Monday but made it back just in time for more late night appearances

Supportive: Oliver has represented M&S as a male model, but Pixie was being supportive

Supportive: Oliver has represented M&S as a male model, but Pixie was being supportive

Cute duo: Pixie was quite the arm candy in a cutaway sequined dress

Cute duo: Pixie was quite the arm candy in a cutaway sequined dress

Hottest ticket in town: The musician flew back to the UK especially for The Prince's trust's 40th anniversary at Buckingham Palace

Hottest ticket in town: The musician flew back to the UK especially for The Prince's trust's 40th anniversary at Buckingham Palace

Party time: Only the previous evening, they'd been rubbing shoulders with A-listers at Chopard Wild Party

Party time: Only the previous evening, they'd been rubbing shoulders with A-listers at Chopard Wild Party

Can't believe her luck: On the red carpet on Sunday night, Pixie created treasured memories at From the Land of the Moon premiere

Can't believe her luck: On the red carpet on Sunday night, Pixie created treasured memories at From the Land of the Moon premiere

Ready to party: Just hours after touching down in Cannes, the duo were in the party clobber for Chopard x Annabel's Cannes party on Saturday night

Ready to party: Just hours after touching down in Cannes, the duo were in the party clobber for Chopard x Annabel's Cannes party on Saturday night

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