Kelly Osbourne celebrates her 40th birthday with a lavish karaoke party - complete with a Chanel themed cake, pizza delivery and personalised hot dogs

Kelly Osbourne continued her 40th birthday celebrations with a lavish karaoke party in California on Friday night.

The star celebrated the big 4-0 in a strapless Vivienne Westwood top and satin skirt, teamed with towering black heels.

Inside the fun-filled bash, Kelly took to the stage and sang her heart out alongside a live band.

The party was kitted out with a three-tier Chanel themed birthday cake, personalised hot dogs by Pink's Catering and a huge pizza delivery.

Kelly looked completely overjoyed as she partied with her nearest and dearest, including her mother Sharon.

She captioned her post: 'My birthday was amazing! Thank you to everyone who made this day special. Thank you for the throwing me the best karaoke party ! ❤️'

In recent months, rumors swirled that she used the popular weight loss drug Ozempic — a medicine for adults with type 2 diabetes — to shed some pounds after giving birth to her son in 2022.

The starlet claimed she had not used the drug back in late April, instead revealing she 'rapidly' lost weight by cutting out 'sugar and carbohydrates.'

'I know everybody thinks I took Ozempic. I did not take Ozempic. I don't know where that came from. My mom took Ozempic,' she explained to Extra at the time.

Despite previously praising the drug, she opened up about her battle with gestational diabetes during pregnancy, which influenced her decision to lose weight. 

'I had gestational diabetes, and I had to lose the weight that I had gained during pregnancy, otherwise I was at a higher risk of actually getting diabetes, which I did not want,' the model claimed.

Kelly also got candid about using special toning treatments, such as EMFACE and EMSCULPT NEO, to sculpt her face and tighten her body.

'I had the baby and my stomach got so many stretch marks, and the skin, it looks like it lost its elasticity,' she shared. 

Earlier this year while at Dolly Parton’s Pet Gala she commented on Ozempic, saying, 'I think it's amazing.'

Later in the same interview, she accused critics of the medication and other weight-loss drugs of being jealous. 

'People hate on it because they want to do it,' she claimed. 'And the people who hate on it the most are the people who are secretly doing it or pissed off that they can’t afford it.'

In 2020, she admitted to having undergone gastric sleeve surgery to help her lose 85 pounds.