Who’s got jokes? Kelly Walker, who goes by K-Dubb, has jokes. He did when he was first on Who’s Got Jokes? years ago, and the young man with the old growl of a voice made his network late-night debut Thursday night on Arsenio, joking about an argument he got into with a self-checkout machine at the supermarket. K-Dubb also tossed a joke back toward T.I., sitting on the couch with Arsenio Hall.

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