The popstar said she was "overwhelmed" after performing in front of her fans in the 20,000 capacity venue. The 25-year-old, who performed in her hometown on Tuesday night (29 October) as part of her 'Alive Tour', said it is now one more thing ticked off her wish list.
After finishing her concert, the popstar penned a short message on her Instagram account: "Mum and Dad I did it! I sold out the 02! #wishlisttickedoff So thankful! Overwhelmed! #london."
Fans appeared to agree, as they shared their words of congratulations with the singer. One fan said: "I've watched Jessie J grow and mature into such an amazing women. I honestly couldn't be more proud of my idol."
Meanwhile, another commented: "From singing in her bedroom to selling out the O2 Arena. Words cannot even describe how PROUD I am of @JessieJ."
It's been a remarkable few years for Jessie, who first burst onto the pop scene in 2010 with her debut single 'Do It Like A Dude,' which went straight in at number two in the charts.
Jessie also served as a coach on The Voice for two series but quit her position earlier this year. She explained that the success of her music career was the main reason behind her decision to leave, adding that music "has to take priority".
Following her announcement, the 'Price Tag' hitmaker spent months in the US working on her new album Alive. And the future continues to look bright for Jessie, who revealed plans to quit the UK next year in a bid for US stardom!
Jessie will also be on the road with Robin Thicke next year for the North American leg of his tour in February. We wonder what else is on her wish list?!
Watch Jessie J's music video for 'It's My Party' below: