This is a list of the U.S. Billboard magazine Hot 100 number-ones of 1991. The longest running number-one single of 1991 is "(Everything I Do) I Do It for You" by Bryan Adams, which attained seven weeks at number-one. ("Black or White" by Michael Jackson would also spend a total of seven weeks at #1, but only four of those weeks were in the 1991 calendar year.) The November 30 chart ("Set Adrift on Memory Bliss") was the first Hot 100 to be compiled with Soundscan data.