The singer had taken some time off following surgery for an undisclosed condition

By Adam Carlson
Updated July 05, 2015 03:10 PM
Credit: Jon Kopaloff/Filmmagic

Jessie J is back!

Though the singer had recently taken some time off from performing after surgery for an undisclosed condition, she announced on Instagram Satuday she was out of the hospital and back on stage.

“Still fragile,” and not her “usual crazy running around self,” but “much better,” she wrote.

“I’m out of hospital. Still very fragile but much better | I will be at Wireless tomorrow | Not my usual crazy running around self yet but I will be there | Can’t wait,” she wrote, accompanying a photo of the text “celebrate every tiny victory.”

The “Bang Bang” singer, 27, revealed last month that she had undergone surgery, but assured fans it was neither for her voice nor her heart. (She was diagnosed with Wolff-Parkinson-White syndrome as a child – a heart condition that causes irregular heartbeats and shortness of breath.)

“I’m going to be offline for a few days and I wanted to show you why I don’t often share personal stuff (especially about my health) anymore, I just get on with it secretly,” she wrote then. “But I wanted to share with you before someone else might and it gets twisted and exaggerated into something different or worse.”

Jessie ended that post with, “Peace out for a minute people. As Arni said on Graham Norton last night | ‘I’ll be back.’ ”

Your Guide to Surviving Summer Music Festivals

She’s already been out and about, too, celebrating the weekend wedding of friend Lewie Allen. She captioned her post about the ceremony, “First day out of the house after coming out of hospital was PERFECT!”

And as Jessie confirmed in her post Saturday, she will perform at the Wireless Festival in London on Sunday.