This Week in Billboard Chart History: In 1988, Bobby McFerrin Chilled at No. 1

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Bobby McFerrin performing at Royalty Theatre, London on 2October 29,1986.

Twenty-seven years ago, the a cappella 'Don't Worry, Be Happy' topped the Hot 100 No. 1. Plus, remembering chart feats by Alicia Keys, Madonna & Luther Vandross.

Your weekly recap celebrating significant milestones from more than seven decades of Billboard chart history.

Sept. 21, 1991

After the oh-so-direct "I Wanna Sex You Up" reached No. 2 on the Billboard Hot 100 in June 1991, Color Me Badd reigned with the more traditionally romantic "I Adore Mi Amor."

Sept. 22, 2007

Alicia Keys' "No One" debuted on the Billboard Hot 100 at No. 71. Ten weeks later, it reached No. 1, becoming her third of four leaders so far.

Sept. 23, 1989

More than a year before being exposed for not singing its hits, Milli Vanilli scored its second of three Billboard Hot 100 No. 1s, as ballad "Girl I'm Gonna Miss You" reached the summit.

Sept. 24, 1988

On this date 27 years ago, Bobby McFerrin topped the Billboard Hot 100 with the a cappella pop culture-conquering "Don't Worry, Be Happy." (Ah … feel more relaxed after listening?)

Sept. 25, 1982

It was no trick: the Steve Miller Band appeared at No. 1 on the Billboard Hot 100 with "Abracadabra."

Sept. 26, 2009

Madonna scores her 40th No. 1 on the Dance Club Songs chart, as "Celebration" reaches the top. Madge has since upped her record sum to 46.

Sept. 27, 2003

Luther Vandross' touching "Dance With My Father," his final Billboard Hot 100 top 40 hit, peaks at No. 38. In a 2012 visit to Billboard's New York offices, Richard Marx recalled how he came to co-write the song with the late R&B legend. "In the aftermath of me losing my dad, Luther was one of the only people who knew what to say to me. He knew when to call me … it was like telepathy. He helped me through that time tremendously."