The 'Price Tag' musician was forced to pull out of a show in Wales last weekend when she was taken ill with a viral infection.
Jessie J posted a message on her Twitter page on Monday (July 23) confirming that she is feeling better, writing: "I'm so pleased that I'm able to play my gigs to my fans tomorrow, watch out @myibizalive & @mymallorcalive I'm coming to get'cha!! Boooooom!!"
Organisers have also confirmed that she will appear as planned, playing at Ibiza's Eden club and BCM in Mallorca on the same night.
It was claimed in the press yesterday that Jessie J will not be returning to The Voice UK for its second series due to touring commitments.
Neither the BBC nor production company Wall to Wall has yet made comment on the coaching panel for the show's return.
Watch Jessie J's music video for 'Laserlight' below: