<Table> Key <Tr> <Td> The yellow background indicates the #1 song on Billboard's 1981 Year - End Chart of Pop Singles . </Td> </Tr> </Table> <Tr> <Td> The yellow background indicates the #1 song on Billboard's 1981 Year - End Chart of Pop Singles . </Td> </Tr> <Table> <Tr> <Th> Issue Date </Th> <Th> Song </Th> <Th> Artist (s) </Th> <Th> Reference </Th> </Tr> <Tr> <Td> January 3 </Td> <Td> "(Just Like) Starting Over" </Td> <Td> John Lennon </Td> <Td> </Td> </Tr> <Tr> <Td> January 10 </Td> <Td> </Td> </Tr> <Tr> <Td> January 17 </Td> <Td> </Td> </Tr> <Tr> <Td> January 24 </Td> <Td> </Td> </Tr> <Tr> <Td> January 31 </Td> <Td> "The Tide Is High" </Td> <Td> Blondie </Td> <Td> </Td> </Tr> <Tr> <Td> February 7 </Td> <Td> "Celebration" </Td> <Td> Kool & the Gang </Td> <Td> </Td> </Tr> <Tr> <Td> February 14 </Td> <Td> </Td> </Tr> <Tr> <Td> February 21 </Td> <Td> "9 to 5" </Td> <Td> Dolly Parton </Td> <Td> </Td> </Tr> <Tr> <Td> February 28 </Td> <Td> "I Love a Rainy Night" </Td> <Td> Eddie Rabbitt </Td> <Td> </Td> </Tr> <Tr> <Td> March 7 </Td> <Td> </Td> </Tr> <Tr> <Td> March 14 </Td> <Td> "9 to 5" </Td> <Td> Dolly Parton </Td> <Td> </Td> </Tr> <Tr> <Td> March 21 </Td> <Td> "Keep On Loving You" </Td> <Td> REO Speedwagon </Td> <Td> </Td> </Tr> <Tr> <Td> March 28 </Td> <Td> "Rapture" </Td> <Td> Blondie </Td> <Td> </Td> </Tr> <Tr> <Td> April 4 </Td> <Td> </Td> </Tr> <Tr> <Td> April 11 </Td> <Td> "Kiss on My List" </Td> <Td> Daryl Hall and John Oates </Td> <Td> </Td> </Tr> <Tr> <Td> April 18 </Td> <Td> </Td> </Tr> <Tr> <Td> April 25 </Td> <Td> </Td> </Tr> <Tr> <Td> May 2 </Td> <Td> "Morning Train (Nine to Five)" </Td> <Td> Sheena Easton </Td> <Td> </Td> </Tr> <Tr> <Td> May 9 </Td> <Td> </Td> </Tr> <Tr> <Td> May 16 </Td> <Td> "Bette Davis Eyes" </Td> <Td> Kim Carnes </Td> <Td> </Td> </Tr> <Tr> <Td> May 23 </Td> <Td> </Td> </Tr> <Tr> <Td> May 30 </Td> <Td> </Td> </Tr> <Tr> <Td> June 6 </Td> <Td> </Td> </Tr> <Tr> <Td> June 13 </Td> <Td> </Td> </Tr> <Tr> <Td> June 20 </Td> <Td> "Stars on 45 Medley" </Td> <Td> Stars on 45 </Td> <Td> </Td> </Tr> <Tr> <Td> June 27 </Td> <Td> "Bette Davis Eyes" </Td> <Td> Kim Carnes </Td> <Td> </Td> </Tr> <Tr> <Td> July 4 </Td> <Td> </Td> </Tr> <Tr> <Td> July 11 </Td> <Td> </Td> </Tr> <Tr> <Td> July 18 </Td> <Td> </Td> </Tr> <Tr> <Td> July 25 </Td> <Td> "The One That You Love" </Td> <Td> Air Supply </Td> <Td> </Td> </Tr> <Tr> <Td> August 1 </Td> <Td> "Jessie's Girl" </Td> <Td> Rick Springfield </Td> <Td> </Td> </Tr> <Tr> <Td> August 8 </Td> <Td> </Td> </Tr> <Tr> <Td> August 15 </Td> <Td> "Endless Love" </Td> <Td> Diana Ross and Lionel Richie </Td> <Td> </Td> </Tr> <Tr> <Td> August 22 </Td> <Td> </Td> </Tr> <Tr> <Td> August 29 </Td> <Td> </Td> </Tr> <Tr> <Td> September 5 </Td> <Td> </Td> </Tr> <Tr> <Td> September 12 </Td> <Td> </Td> </Tr> <Tr> <Td> September 19 </Td> <Td> </Td> </Tr> <Tr> <Td> September 26 </Td> <Td> </Td> </Tr> <Tr> <Td> October 3 </Td> <Td> </Td> </Tr> <Tr> <Td> October 10 </Td> <Td> </Td> </Tr> <Tr> <Td> October 17 </Td> <Td> "Arthur's Theme (Best That You Can Do)" </Td> <Td> Christopher Cross </Td> <Td> </Td> </Tr> <Tr> <Td> October 24 </Td> <Td> </Td> </Tr> <Tr> <Td> October 31 </Td> <Td> </Td> </Tr> <Tr> <Td> November 7 </Td> <Td> "Private Eyes" </Td> <Td> Daryl Hall and John Oates </Td> <Td> </Td> </Tr> <Tr> <Td> November 14 </Td> <Td> </Td> </Tr> <Tr> <Td> November 21 </Td> <Td> "Physical" </Td> <Td> Olivia Newton - John </Td> <Td> </Td> </Tr> <Tr> <Td> November 28 </Td> <Td> </Td> </Tr> <Tr> <Td> December 5 </Td> <Td> </Td> </Tr> <Tr> <Td> December 12 </Td> <Td> </Td> </Tr> <Tr> <Td> December 19 </Td> <Td> </Td> </Tr> <Tr> <Td> December 26 </Td> <Td> </Td> </Tr> </Table> <Tr> <Th> Issue Date </Th> <Th> Song </Th> <Th> Artist (s) </Th> <Th> Reference </Th> </Tr>

What was the number one song on july 21 1981
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