Number one US songs in May, 1977

What songs were number one in May, 1977? There were 4 USA #1 songs in May, 1977.

These number one songs in May, 1977 began with Southern Nights by Glen Campbell which went to #1 on 30th April, 1977 and remained at the top spot for just one week.

The last number one song of 1977 was Sir Duke by Stevie Wonder which went to #1 on 21st May, 1977 and remained at the top spot for 3 weeks.