Jessie J has cancelled two gigs because of issues with her voice.

The 25-year-old singer was planning on supporting Justin Timberlake during his 20/20 Experience concert at Phoenix Park in Dublin last night (10.07.13) and taking the stage in Paris this evening (11.07.13) but is being forced to miss both performances because of a sore throat.

Jessie, who refers to her fans as Heartbeats, tweeted: ''Heartbeats, I'm so sorry I can't be with you at my shows tonight in Dublin or tomorrow in Paris. I promise I will be back very soon! X''

The star was believed to have been planning a set of acoustic songs songs at the latter performance.

Earlier in the week Jessie also missed an appearance on 'The Rick O'Shea Show' on 2fm, with her manager Cez Darke explaining she needed to ''rest her voice''

Jessie hinted she was having difficulty with her vocals, which were ''dry'' and she compared her voice to Marge Simpson from the animated sitcom 'The Simpsons' saying she was giving ''Marge Simpson vibes!''

The Coronas stood in and took Jessie's slot, just hours after an intimate gig for the President of Ireland, Michael Higgins at the same venue, making them the only band ever to have played Phoenix Park twice in the same day.