Katy Perry was among the celebrities on the red carpet at the Elle Style Awards yesterday in London. Heads turned when she was seen sporting a massive diamond ring on her wedding finger!

Elle's pick for Woman of the Year wore the emerald-cut stone, which blinged against her bright-red manicure.

Katy’s rep didn’t comment about the possibility that it was an engagement ring from her boyfriend, John Mayer.

Source: E!