The song is her fifth No. 1 on the radio airplay tally.
"Send" follows Adele's four prior Adult Pop Songs No. 1s: "Rolling in the Deep" (13 weeks), "Someone Like You" (nine) and "Set Fire to the Rain" (four), all from her album 21 in 2011-12, and lead 25 smash "Hello" (seven weeks beginning on the Dec. 5, 2015, chart). (In between "Hello" and "Send," second 25 single "When We Were Young" reached No. 3 in March.)
With her new coronation, Adele ties Nickelback for fifth place among acts with the most No. 1s in the Adult Pop Songs chart's 20-year history. The acts trail only Maroon 5 (11), Katy Perry, P!nk (eight each) and Taylor Swift (six).