Please help me Identify this song! T_T

pls help me identify this oldie song.. i only have one line though.. it may be challenging for you.. this line is in the chorus part...

"sometimes I wonder what's wrong... sometimes I wonder what she feels.. blah blah.." (it sounded like that on the radio)

the artist has the tone of the artist El Debarge, Prince and all high-piched male artists.. I think it's like an afro-american artist in the like..

Please! Help me in identifying the song!
(tox_dox@yahoo.com.ph- yahoo mess.) asap