DJ Khaled pops the cork on summer. His “I’m the One” made both Shazam and Spotify’s “Songs of Summer” lists. (Photo courtesy We The Best Music Group)

Spotify and Shazam both released their song of summer picks, and in a show of seasonal solidarity, there is some crossover: Selena Gomez, Sean Mendes, Luis Fonsi and DJ Khaled and Lil Uzi Vert are the five double-entries. Spotify’s list tilts toward rap while Shazam gives pop equal time.

“Summertime is the season of sunny weather, good vibes and good music,” Shazam’s Senior Director of Research Scott Holechek, noting an uptick of 5%-10% in global Shazams through the summer, “depending on the month, which gives a solid indication of the cultural correlations between summer, music and people.” Holechek stressed Shazam’s annual role in helping shape summer playlists by enabling music discovery.

Meanwhile, Spotify had to deflect incoming: The Verge called out the streamer on an abundance of contenders — “Anyone can guess the song of the summer if they get 15 tries!” — and went on to complain that the Spot-on pics are mostly summer bummers (while they try to helpfully include rapper Logic’s suicide prevention “1-800-273-8255,” its chorus of “I just wanna die, lemme tell you why…” could send the wrong message for those who don’t catch the subtext).

Inexplicably, Spotify omits Harry Styles — season of treason! Styles’ “Sign of the Times” made Shazam’s list — but does includes his former One Direction bandmates: Niall Horan with “Slow Hands” and Liam Payne with “Strip That Down” — setting up a 1D summer smackdown.

Gomez’s “Bad Liar,” Khaled’s “I’m the One,” Fonsi’s “Despacito (remix)” and Mendes’ “There’s Nothing Holdin’ Me Back” are the four that pulled double-duty.

Spotify said to cull the list its team analyzed streaming data and “factored in buzz on social media,” trying to cover the bases of “essential summer moments,” in search of songs that will  “join the ranks of summer greats including 2012’s ‘Call Me Maybe’ [Carly Rae Jepsen] and last year’s ‘One Dance’ [Drake].'”

Looking back over last year’s consumption trends, music data firm BuzzAngle found no unusual elevation in summer months, noting a general month-by-month upward trajectory that reflects “a general rise of streaming overall, but nothing out of the ordinary during the summer. Given how easy it is to listen to music year-round, seasonality effects are reduced,” said an analyst for BuzzAngle.

Since there would be no songs of summer without busy scribes, panning for hits, MaxTheTrax decided to pull the curtain back to see if there is a songwriter of summer. Among the 20 songs, there are only three songwriters who have more than one credit: Julian Bunetta, Justin Tranter and Benjamin Levin (better know as Benny Blanco) each had two.

And for the shout-out they get to thank compatriot Ross Golan, who recently shared BMI Songwriter of the Year honors in a tie with Tranter — because his “And the Writer Is…” podcast has cast a white-hot spotlight on tunesmiths. Bunetta co-authored “Craving You” (performed by Thomas Rhett and Maren Morris) and Horan’s “Slow Hands,” Tranter waxed poetic on Gomez’s “Bad Liar” and Julia Michaels’ “Issues,” the latter with Levin, who also has a credit on Camila Cabello’s “Crying in the Club.”

Alas, Golan is not on this preliminary list, but when Billboard starts running its “Songs of Summer” chart next week the season may smile on him yet. “Sometimes you gotta hope you have the underdog record,” he said. “Mine is the Jonas Blue remix of Jasmine Thompson’s ‘Old Friends.’ Jasmine’s not famous like the rest of the list…. but if the cards fall right, she will be!” Optimism, after all, is the stuff of summer dreams are made of.

The complete playlists can be seen below. Or listen here for the Shazam summer picks.