Wow-that was a thread killer. the quote is from the Mighty Quinn, a lite weight flick with Denzel Washington as a Carribean island police chief, a dead guy cooked in a hottub, with a Reggae soundtrack. Rita Marley is the screamer in the beginning and two Marley daughters sing back up to Denzel's wife.
Here's a cheesy clip:

http://www.youtube.com/watch?v=8Su6JW2K_Kg&feature=related