Rihanna and Chris Brown engagement rumors refuse to go away - after the pop beauty was photographed sporting a huge diamond ring on her wedding finger.

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The pair took to the stage at Elton John's New Year's Eve party at London's O2 Arena on Wednesday to perform a duet, according to Britain's The Sun newspaper. And the Bajan beauty fueled speculation of an impending engagement announcement when she was spotted showing off a huge rock in a pair of fingerless leather gloves at the event.

Rihanna and Brown have frequently refused to confirm they are an item - despite Internet gossips recently claiming the rumored couple were living together.

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(This news article provided by World Entertainment News Network)