She is believed to have lost more than a stone in weight after taking up Pilates.
And Adele looked sensational as she showcased her killer frame inside Drake's 33rd birthday bash, which was held at Goya studios in Hollywood on Wednesday.
The Rolling In The Deep singer, 31, stunned in an off the shoulder black velvet gown as she partied the night away with her pals at the glitzy bash.
Adele's floor-length gown was cinched around her waist with a chunky black leather belt, which highlighted her hourglass physique perfectly.
The songstress worked her blonde locks up into a sleek bouncy ponytail, and added further glam with a pair of statement silver cross earrings.
Adele accentuated her pretty features with an expertly-applied coat of make-up, including a shimmering bronze eye shadow and a pink lip.
The beauty shared a playful photo from the evening's events, with the caption: 'I used to cry but now I sweat.'
She also added the hashtag #gingermckenna' - in homage to the iconic villain from the 1995 film Casino, played by Sharon Stone.
The star continued: 'Happy birthday to one of the kindest and funniest people I’ve met @champagnepapi.'
It was reported in June earlier this year that Adele's Reformer Pilates class has given her a new lease of life as she has lost more than a stone in weight after attending the workout with pal Ayda Field.
A source told The Sun: 'Adele has been out enjoying herself and she sees that as her priority at the moment, along with being a mum to Angelo.
She has been loving her new workout regime and it really works for her.
'It’s a bonus that she has shifted some weight. Her mates are glad she’s letting loose and there’s nothing but good feelings towards her. She’s got a new lease of life.'
Later in the evening, Adele was pictured sneaking out of the very star-studded party, where she rubbed shoulders with the likes of Diddy, 49, Future, 35, and Chris Brown, 30, at the exclusive hotspot.
But there was no sign of Adele's rumoured new boyfriend, Grime artist Skepta, 37, - the pair are said to have been on a string of dates following her split from husband Simon Konecki, 45.