An exec who oversees music for 850+ radio stations tells us what the Song of Summer will be, and why

For over 20 years, Tom Poleman has tried to figure out what will be the Song of the Summer.

Poleman is the head of programming for iHeartMedia, the radio giant that operates more than 850 stations including New York's Z100, where Poleman has had a hand in the day-to-day music decisions since 1996.

Poleman began his foray into radio in the 80s, when he worked for his college radio station at Cornell. And he says one of his favorite things through the years has been trying to identify what that timeless hit was going to be every year.

What makes a Song of the Summer?

"Being upbeat and fun is part of it," Poleman says. "It does resonate … Tempo songs tend to do great, reggae tends to cut through in the summertime." He points to last year's "Cheerleader" by Omi as an example.

But it doesn't have to be infused with reggae.

"Any song that is particularly infectious and connects with somebody emotionally" has a shot, he says. Justin Timberlake's "Can't Stop the Feeling" isn't a reggae song, he continues, but it sticks with you. "If you asked me a to pick a summer song right now, I'd absolutely pick [JT's] 'Can't Stop the Feeling'," Poleman says.

Summer Radio

On-demand streaming services like Spotify have transformed the music industry in recent years, sending shockwaves through the market for digital downloads. And these companies, along with internet radio pioneer Pandora, have invested in the ability to provide personalized, radio-like experiences that could be seen as a threat to traditional radio.

Spotify, in particular, scored a runaway hit with its "Discover Weekly," a playlist that uses artificial intelligence to picks new songs you'll like every week. Many people (including me) swear by it.

But Poleman thinks both can succeed.

"Radio is social, first and foremost," Poleman says. People have time they want to feel connected to the world, to what's hot, Poleman explains. They also have times when they want their exact tastes to be served up to them. Poleman thinks there's room for both pop radio and the ultra-personalized (and iHeartMedia has a foot in both camps, though it plays more in the former).

And radio shines in the summer, he says.

"People are outside, out of the home, heading down to the Jersey Shore," he says. You want to be able to sing out the lyrics to the latest pop hit on the dance floor.

Choosing the summer songs

"There's a lot more science behind [programming for the radio] than people think," Poleman says. "You would be amazed at the spreadsheets that we look at every music meeting." Poleman and his team pull data from a wide variety of sources, from digital sales, to "thumbs ups" in streaming apps, to tactic called "hit predictor."

"Hit predictor" is when Poleman's team gets a sample of listeners and makes them listen to a new song over and over again - at least 20 times in its entirety - and then asks them about it. "Could you see this being a hit?" One example of a song that crushed it in "hit predictor" was Charlie Puth and Selena Gomez's "We Don't Talk Anymore."

"It had one of the highest scores I've ever seen," Poleman says.

But it's not going to be the Song of the Summer (it was released in January). Here are the ones that have a shot:

Poleman's top picks, from highest to lowest likelihood:

1. Justin Timberlake "Can't Stop The Feeling"
2. Drake "One Dance
3. Sia "Cheap Thrills"
4. Kent Jones "Don't Mind"
5. Chainsmokers "Don't Let Me Down" ft. Daya
6. Calvin Harris "This is What You Came For" ft. Rihanna
7. Fifth Harmony "Work From Home"