Sean Penn slapped the cuffs on Madonna and it only cost him $150k -- instead of marriage and a messy divorce.
The exes ended up on stage for Madonna's charity event -- Raising Malawi -- during Art Basel in Miami. She told the crowd she'd marry Sean again if he bid $150,000 for a necklace, and he did.
He was outbid for the jewelry. As for the marriage part? The jury's still out.
Watch what happened when Madge called Sean on stage -- she's professed love, but she's done this kinda thing before.
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