The Hot Right Now hitmaker, 29, flashed serious sideboob as she slipped into a plunging white dress, which coordinated with her matching silk headscarf.
Highlighting her figure, the musician stunned as she went braless underneath the low-cut ensemble.
The singer upped the style ante as she was decked out in gold and turquoise-stone jewellery.
Looking as radiant as ever, the former ANTM presenter complemented her complexion with matte make-up.
Rita faces 14 days of quarantine when she returns to the UK after the government pulled its air bridge with Spain following a spike in COVID-19 cases.
The blonde beauty and her Greek-French director beau, 39, were first seen together last month after a night of partying.
Speaking to The Sun, friends insisted Rita was involved with the filmmaker after she was seen enjoying a boozy night out with business tycoon Faton Gashi.
A source 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.'
Rita's previous boyfriends include Calvin Harris, Andrew Garfield, Rob Kardashian, musician Andrew Watt and Ricky Hil - the son of fashion designer Tommy Hilfiger.
The media personality has spent lockdown working on new music while also enjoying time with her friends in the countryside.