The singer, 29, and friends including tycoon Faton Gashi dined out on Saturday afternoon before parting ways.
They reunited for a drinking session with more friends, before Rita and all her group headed to hers to party.
Sources close to the singer insist she is in a serious relationship with music video director Romain Gavras, 39.
They have been an item for four months — with the romance said to be going from strength to strength.
Rita’s big night out was her first since lockdown — and echoed one earlier this year with Towie star Joey Essex.
Onlookers first spotted her in a mask at a London salon on Saturday afternoon.
Her group went for drinks but left separately.
But later they partied at Soho House to 3.30am.
Just before 4am her group was seen arriving at her home in Holland Park.
An insider said: “Rita was hitting the town with friends including Faton. But she’s in a serious thing with Romain and properly loved up. It’s the first time she’s been serious with someone in ages.”
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