Sean Kingston -- I Didn't Crash-n-Dash in My Maybach

Sean Kingston is adamant, "I didn't do no hit and run" ... despite TMZ video that appeared to show the singer love-tapping his $400k Maybach into another expensive car and then leaving the scene this weekend.

Kingston was leaving Colony nightclub in Hollywood Monday night ... in a completely different disgustingly expensive ride, a Rolls Royce, when he insisted there was no fender bending the other night.

We're still not 100% on that -- so let's go back to the tape ...