The former judge was snapped looking rather fantastic in a white halterneck bikini while surrounded by crew members on the beach this week.
Tulisa was a judge on the ITV talent show for two years before being replaced by Sharon Osbourne for last year's tenth series.
Rumours had been swirling she'd return to the series for its upcoming 11th season as a guest judge for Louis, who she has remained friends with since leaving the programme, and an insider has confirmed to Reveal that Tulisa will indeed feature in the show.
Tulisa won X Factor with her group Little Mix in series eight, making her the first and only judge to mentor a group to victory.
She sent happy third birthday wishes to her Little Muffins earlier this week. Since winning X Factor, the band, featuring Jesy Nelson, Jade Thirlwall, Leigh-Anne Pinnock and Perrie Edwards, have gone on to smash chart records in the US and have huge success in the UK.
The following year she mentored the girls which included Ella Henderson, who is now soaring high in the charts with her fabulous single 'Ghost'.
X Factor returns to ITV on 30 August.
Louis will be joined on the judging panel by returning judges Simon Cowell and Cheryl Fernandez-Versini, alongside new addition, Scary Spice Mel B.
Over on Xtra Factor, presenter Caroline Flack has been replaced by Radio 1Xtra DJ Sarah-Jane Crawford.
Watch the X Factor 2014 trailer below:
Reveal is now on Google Plus! Join us here for the latest pictures, fashion and celebrity news!