February 15, 1986 – “How Will I Know” hit #1 on the Billboard Hot 100 and Adult Contemporary charts — both on the same day! The song was written by George Merrill and Shannon Rubicam, and produced by Narada Michael Walden, who made a few changes in the song to suit Whitney. Cissy Houston also sang background vocals on the song. The single would hit #1 on the Billboard Hot R&B/Hip-Hop Songs chart a few weeks later.