YouTube sensation Keenan Cahlil made a guest appearance on “Chelsea Lately” last night (Mon. Nov 8)…….and to his surprise got to record a brand new video with rapper 50 Cent. Peep the hilarious footage of the Jimmy Neutron look-a-like with his new buddy Curtis lip-synching to “Down on Me” (Jeremih f/ 50 Cent) below!!

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