Watch Boyz II Men Perform 'You Just Got Slapped' On How I Met Your Mother — cinemablend.com

With How I Met Your Mother set to wrap up this year, fans of the CBS comedy have been left to wonder when and how Marshall would administer the two remaining slaps he owes Barney, left over from a slap bet he made with him years ago. The gag has spanned seasons, every once in a while resurfacing as Marshall delivers one more epic slap � usually when Barney�s not expecting it. He was expecting it during last night�s episode, and the slap was pretty glorious. So glorious, in fact that the catchy song �You Just Got Slapped� was also revived, covered this time around by the great Boyz II Men at the end of the episode.

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