The singer, who will return as a coach for the second run, posted images of herself filming the auditions online.
Jessie J can be seen in the show's famous red chairs, which spin around as part of the blind auditions stage of the competition.
will.i.am, Danny O'Donoghue and Sir Tom Jones have also returned and began filming the series at Manchester's MediaCityUK earlier this month.
BBC boss Danny Cohen recently confirmed that the show's second run would have "less live shows" and "more blind auditions and battle rounds".
Jessie J has also delayed her 2013 tour to finish her sophomore album.