The 33-year-old took to Instagram with a series of snapshots showcasing her recent relaxation activities.
In one of the photos Rita stripped fully naked and covered herself by raising her leg.
She sat in the red light sauna, designed for detoxification and relaxation.
The Masked Singer judge captioned the post: “2024 thus far… prepping for the best year yet!”
One fan commented: “@ritaora 2024 will be the best year yet RO4 is happening. OMG insanely hyper.”
Another added: “Can’t wait to see what you’ve been cooking up.”
A third penned: “Beautiful, Stunning, Gorgeous.”
The pop star joined the Masked Singer judging panel alongside Davina McCall, Mo Gilligan and Jonathan Ross just over a week ago.
The fifth season of the singing competition kicked off in December with a character called the Maypole.
Fans speculated that it was Rita behind the mask as she was conspicuously absent from her usual spot.
She’s also set to skip the singing competition in week three and will be replaced in a rare judging shake-up by Olly Murs.