The ring sparks fresh rumours around her engagement to boyfriend Ben Simmons, who is an American basketball player.
The pair have never confirmed the rumours, but reports speculate that Jama, 27, became engaged to Simmons, 25, over the festive period.
The TV presenter wore a revealing black cut-out crop top and skirt co-ord by Mônot, with a ring clearly visible on her finger.
The star-studded event is being held at the O2 Arena in London on February 8.
The Brit Awards 2022 will be on ITV and ITV hub at 8pm and will end at 10.30pm