New R&B song?

Anyone heard this new R&B song? It goes something like...
"such a small world, I seen her just the other day, she was goin the other way. I just smiled and passed, I knew we'd never last."

Its a guy and girl singing, they sing back and forth to each other. Really catchy, any help would be great.

Are you talking about Neyo and Rihanna "Hate That I Love You"?

I tried to find but nothing.

dont know

there's lots of them
like :
One wish by Ray Jay
South side by Llyod

Anything By T-pain