Kate Moss was spotted puffing on a vape and sipping a beer as she enjoyed a day out at BST Hyde Park on Friday where Neil Young was headlining.
The supermodel, 51, looked typically stylish in a plunging leopard print maxi dress and sandals.
She hid her eyes behind dark sunglasses and wrapped a thick scarf around her, despite the UK heatwave.
Kate toted her belongings in a large shoulder bag and accessorised with a quirky gold eye ring.
She was spotted enjoying a few beers with pals and puffing on a red vape while watching Neil headline the event from the VIP area.
The image of Kate with a beer and vape in hand is in stark contrast to the clean-living persona she's had in recent years following her heyday in which she was nicknamed 'The Tank' by friends for her love of substances.
She recently sparked concern among her fanbase after being filmed looking 'fraught' and 'on edge' as she sat front row at Paris Fashion Week.
Kate was thought to have given up alcohol back in 2017 in favour of juice fasts and reformer Pilates, even selling her own range of teas and skincare products through her beauty and wellness brand, Cosmoss.
And while she has long struggled to give up her nicotine habit, just two years ago Kate - once hailed the 'greatest smoker of all time' - was seen puffing away on a vape in an attempt to give up the cigarettes.
Back in January, Kate was reportedly planning a huge boozy birthday bash to celebrate her 51st birthday following her split from boyfriend of nine years, Nikolai von Bismarck , 38.
Kate, who lived in the Cotswolds with teetotal photographer Nikolai, apperently decided at the time that she 'wants to let her hair down' to mark her birthday with her famous pals.
A source told The Sun: 'Last year, she celebrated her 50th at an intimate soiree in Paris, which was fairly pared down.
'But a lot has changed since then and Kate has said she wants this party to be like turning over a new leaf.
'Now that her daughter Lila is all grown up and she is single again, Kate feels like she wants to let her hair down and be carefree -- which is not something she's been able to do for a long time.'
The supermodel, 51, looked typically stylish in a plunging leopard print maxi dress and sandals.
She hid her eyes behind dark sunglasses and wrapped a thick scarf around her, despite the UK heatwave.
She later decided to remove the scarf.
Kate toted her belongings in a large shoulder bag and accessorised with a quirky gold eye ring.
She was spotted enjoying a few beers with pals and puffing on a red vape while watching Neil headline the event.
Kate and her pals threw their arms in the air during the performance.
'She is looking on the bright side of life. Although it's sad her relationship is over, she is throwing herself back into her social life and embracing the new year.'
She went on to start her new chapter celebrating her 51st birthday at A-list restaurant China Tang at The Dorchester before continuing her night until the early hours at The Globe in London's Notting Hill.
Kate's outing at BST Hyde Park comes after she returned from a mother daughter Ibiza trip.
The Croydon-born beauty sported a tiny black bikini paired with denim hot pants as she dropped her trademark pout to laugh uproriously with her only child.
In an uncharacteristically animated moment, the stunner, who has appeared on a whopping 78 Vogue covers, looked radiant on her holiday where her glowing skin showcased the results of her clean lifestyle, having turned her back on partying.
Lila, who is now a model in her own right, was also clad in a black bikini but she layered a Jim Beam whiskey T-shirt on her top half.
Lila's father is Dazed Media chief executive Jefferson Hack, with whom Kate was in a relationship in the early Noughties.
Her latest appearance comes after Kate sparked concern among her fanbase after being filmed looking 'fraught' and 'on edge' as she sat front row at the Isabel Marant ready-to-wear showcase.
Kate and Lila have spoken candidly in the past about their unconventional relationship, with Kate telling Vogue in 2023: 'There were still rules in our house - always say please and thank you; never go out with wet hair or you'll catch a cold - even if I wasn't that strict. Now that she's 21, Lila's the one setting rules for me.
'Wear SPF50; quit smoking... Although she did give me this cigarette case as a gift recently that I just love... She's flown the nest now; got her own place downtown New York; but she's still so young my mind...
'I feel like I'd already lived quite a few lives Lila's age. I'd gone abroad. I'd had one serious boyfriend—moved on next. In a lot ways though Lila’s so much more grown-up than I was back my 20s...
'Watching establishing career model takes right back ‘90s when I was just starting out; but I know things different her.
'She understands can say no; for one thing; which I never did; and she’s right people around her—I’ve made sure that.
'And let’s face it; she’s lot more sensible than I was back then. I mean…thank God. Ha!'