Please help find this cartoon tune....

I am searching for a tune I heard in an Edinburgh Bar in january this year, it was an R'n'B type tune featuring the main artist who was Male, and a cartoon character who came in on the chorus, they also sang out together at the end of the song. The Cartoon voice sounded familiar and had attitude, not a chipmunk type voice

Not:
Ludacris - How Low
Lil Wayne - Throw It In The Bag
AKon - Mr Lonely
BLack Eyed Peas - Rock That Body

Hope someone can help.......cheers.