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Celebrities are known for throwing extravagant birthday parties costing thousands, and for many, a stunning cake is the pièce de résistance.

But despite their seemingly endless budgets and designer bakers, style cannot be bought.

Speaking to the Daily Mail, 'Queen of Etiquette' Laura Windsor has delivered her verdict on stars' birthday cakes - from heavily iced delights to unusual toppings and designs.

Her verdicts include Kylie Jenner's gemstone-adorned sponge that she served at her 29th birthday party last weekend, Victoria Beckham's meringue cake, and Olivia Attwood's Barbie-themed cake.

Read on to discover which stars know how to keep their birthday cakes sophisticated (and those who don't), according to Laura...

Maura Higgins

'Queen of Etiquette' Laura Windsor has rated celebrity birthday cakes, including Maura Higgins'

Laura: 'This feels less like a birthday cake and more like a beautifully choreographed piece of theatre - the pink bows, the pink cake, the balloons behind her, all working together to create that perfect shot.

'I imagine the cake may be less about eating and more about accessorising her outfit and the ambience.

'It's feels more prop than birthday cake. The question is whether there's she's going to take a bite once the camera stops clicking….'

Verdict: Staged

Emily Atack

Emily Atack's cake prioritised 'simple pleasure', said Laura

Laura: 'There's real elegance in Emily's simplicity - nothing decorative, nothing performed, just a cake!

'Clearly It's one of her favourites and is enjoying it without any need for spectacle. She looks genuinely happy eating it, and that's the whole point.

'No elaboration, no carefully constructed image, just simple pleasure. Sometimes the most elegant thing anyone can do is eat the cake you actually like and forget about social media.'

Verdict: Simple but effective

Kylie Jenner

Kylie Jenner celebrated her 29th birthday with a gemstone cake

Laura: 'Kylie Jenner's gemstone cake is certainly not what I would describe as universally elegant.

'It's glitzy, shiny, sparkly and very much bling. But then again, she's young, it reflects her personality, and if that's what makes her happy, then so be it. That's exactly what a birthday cake should do.

'The gemstones, the sparkle - it all feels very Kylie Jenner. It's a reflection of her personality and her particular brand of luxury.'

Victoria Beckham

Victoria Beckham's cake was 'stylish, understated and, ultimately, elegant,' said Laura

Laura: 'This is exactly what I would expect from Victoria Beckham: stylish, understated and, ultimately, elegant.

'She is incredibly talented at choosing things that look effortlessly chic - although, given that she is a fashion designer, perhaps we shouldn't be very surprised.

'What I particularly like is that the elegance doesn't stop with the cake. The entire atmosphere has been thought about.

'The lighting is soft and subtle, the backdrop complements the cake beautifully. She's thought about the whole picture — not simply what is on the plate, but what surrounds it.

'And that, to me, is an important part of elegance: it's about creating harmony with your surroundings , not just with an individual element.'

Tommy Fury

Tommy Fury's minimalistic cake was on brand, according to Laura

Laura: 'Yes, it's minimalist - but I suspect that's simply the way he is. And, if you look at the kitchen around him, the choice of cake makes perfect sense - the whole space is understated and minimal, and the cake reflects that perfectly.

'I'm slightly less certain about the things sticking out of the top. I'm not entirely sure what they are meant to be.

'To me, they look a little like the branches of a tree in winter after all the leaves have fallen off. Perhaps that's very artistic — or perhaps I simply need to brush up on my cake vocabulary! But is it elegant? Yes.'

Verdict: On brand

Olivia Attwood

The etiquette expert said Olivia Attwood's cake left her 'puzzled'

Laura: 'This one leaves me pretty puzzled. Judged purely on elegance, it fails rather decisively.

'The nude Barbie doll perched on top feels more suited to a child's playroom than an adult's birthday celebration. Barbie may have many careers, but I'm not convinced cake topper was one of them.'

Duchess of Sussex

Laura said the Duchess of Sussex's mahjong-themed cake was 'very well proportioned and balanced'

Laura: 'Pretty, picturesque and very much telling a story - the two birds, the soft pastel colours, all come together beautifully. Yes, it's colourful, but the palette is subtle enough that it never feels overwhelming.

'And although the decoration does take over most of the cake, it's all very well proportioned and balanced. Nothing is fighting for attention or competing for the spotlight.'

Verdict: Sophisticated

Joe Swash (made by Stacey Solomon)

Joe Swash's cake was made lovingly by his wife, Stacey Solomon

Laura: 'This cake is certainly picturesque. Elegant in the traditional sense? Perhaps not. But there's another kind of elegance here that I think is worth recognising: the elegance of effort.

'This hasn't simply been picked up from a shop or ordered from a professional cake designer.

'It has clearly taken time, thought and care to make. There's something rather lovely about that - you can almost see the love that has gone into it.

'Perfection is certainly not necessarily elegance. The time someone has taken to make something especially for you is, in itself, a lovely gesture.'

Verdict: Meaningful

Millie Mackintosh

Former Made in Chelsea star Millie Mackintosh's cake 'feels natural,' the expert said

Laura: 'Simple, understated and - because it looks as if she likes it - it's elegant on her own terms. It feels natural rather than staged - and that, to me, is where the elegance lies.'

Verdict: Low-key

Mrs Hinch

According to Laura, what makes Mrs Hinch's cake meaningful, is that it was selected with her children in mind

Laura: 'Made evidently with the two boys in mind, this animal-themed cake is a lovely example of why relevance matters more than conventional idea of elegance.

'It may not be what I would describe as traditionally elegant, but the boys are clearly delighted - and that means a lot.

'A cake that gains the interests of the people it was made for, and actually gets eaten, is what a cake should aspire to.'

Verdict: Endearing