Macaulay Culkin was all tongue-in-cheek Tuesday night ... in the cheek of a middle aged R&B singer.
Culkin and his band, The Pizza Underground, were in Billings, MT with R&B singer Har Mar Superstar ... and he was definitely feeling the band's rendition of "Never My Love."
Macaulay was game for bumping, grinding, dipping and some pretty intense face sucking.
Get these guys a home ... alone.
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