Who sang this song, and where can I fing a CD?

Well, Lyrster - Find a song (http://www.lyrster.com/) told me that the original was done by McFadden and Whitehead, but Luthor Vandross, Big Daddy Kane, Clay Aiken, Ruben Studdard and a band called the "Nylons", all recorded a song with that title. Check Amazon.com: Online Shopping for Electronics, Apparel, Computers, Books, DVDs & more (http://www.amazon.com), orHalf.com (http://www.half.com) to find a copy. Amazon's MP3 service allows you to preview the song, so you can check and see if that's what you want.