Robin Thicke got back to performing tonight and wasted no time using the stage to beg for Paula Patton's mercy ... opening up to the crowd about the break-up and dedicating a song to her.
Thicke wore his wedding ring through the show in Fairfax, VA and told the crowd -- "For y'all that don't know me and my wife separated, but I'm trying to get my girl back. She's a good woman."
Then again, Paula's heard this tune a hundred times.
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