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This time, "shorty" actually refers to a small person.

Rapper 50 Cent popped up again on Chelsea Lately tonight, surprising diminutive guest Keenan Cahill. Chelsea Handler's rumored beau snuck into the studio when Cahill—a sensation on YouTube for his lip-syncing videos—was filming his newest clip backstage. Fiddy then joined the teenager in mouthing and dancing to "Down on Me."

Like any good lip-syncer, Chelsea kept silent about the whole thing.

And the are-they-or-aren't they mystery continues!