I_Know_(Luther_Vandross_song)
I Know (Luther Vandross song)
1998 single by Luther Vandross
"I Know" is a 1998 song by American recording R&B/soul artist Luther Vandross. The single was released in support of his album of the same name. The single reached its lowest peak at number sixty-one on the Billboard's Hot R&B Singles. The song also features singer Stevie Wonder on harmonica.