R&B, lots of 'oo'ing at one stage - male/female duet?!

You know when you hear a song and like it, try to remember a few words to put into google or turn it up for the end and wait for the radio dj to say 'and that was!.!.' and they just never do!? Argh!. Well i don't remember any of the words!.!.something like everywhere!.!.or everytime or everyone (lol who knows!) it definately was a male and female, i felt like i'd heard it somewhere before, sounded a bit like Ne-yo, didn't recognise the female voice and it was a love-y song!.
Any ideas!?Www@Enter-QA@Com

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