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Meg Ryan and John Mellencamp took a romantic stroll down the beautiful Santa Monica promenade, and they they couldn't hide their affection for each other!

We just wish John would put down those nasty cigarettes. Every time we see him out he's got one in his hand. We never see Meg smoke, so hopefully she can help him quit!

Meanwhile, find out who Mellencamp's ex, model Elaine Irwin is hooking up with, after the jump ...