Maren Morris' "The Bones" reaches No. 1 on Billboard's Adult Pop Songs radio airplay chart in record fashion, ascending to the top in its 45th week on the survey (dated April 11).

The song wraps the longest journey to No. 1, besting the 36-week climb for The Script's "Breakeven" in 2009-10.

"The Bones" leads yet another airplay chart, adding to its impressive multi-format résumé.

To recap its history on Billboard format-specific airplay rankings:

Adult Alternative: No. 17 peak, Jan. 25, 2020
Country Airplay: No. 1, two weeks, Feb. 15-22
Pop Songs: No. 27, April 4-11
Adult Pop Songs: No. 1, one week to-date, April 11
Adult Contemporary: No. 8, April 11

"The Bones" also returns to its No. 9 best on the all-genre Radio Songs chart, where it earned another notable honor: It became the first hit by a solo woman and no accompanying billed artists to have topped Country Airplay and reached the Radio Songs top 10 since Taylor Swift's "You Belong With Me" in 2009. Only five other such songs have also achieved the feat: Swift's "Love Story" (2008-09); Carrie Underwood's "Before He Cheats" (2006-07); Faith Hill's "The Way You Love Me" (2000-01) and "Breathe" (1999-2000); and Shania Twain's "You're Still the One" (1998).

Released in February 2019, "The Bones" was first promoted to adult pop radio by Columbia Records last spring, before a remix with Morris' labelmate Hozier won support at the adult alternative format. Marking an atypical pop-to-country crossover chronology, the song was subsequently worked to country radio, by Columbia Nashville, eventually becoming Morris' fourth Country Airplay No. 1.

"We had a lot of confidence that we had something special," says Pete Cosenza, Columbia senior vp/adult promotion, of the song's push to adult pop radio a few weeks after its release. "We'd been watching it on streaming services. We said, 'There's something going on here. Let's go for this.' We sent it out and started chasing it."

Cosenza credits KQKQ Omaha, Nebraska, for playing "The Bones" even before the label serviced it to adult stations, while KLLC San Francisco added it once promotion began and has played it the most (over 3,400 spins, according to Nielsen Music/MRC Data) of any signal to-date, in any format.

"Stations that came onboard got a reaction," Cosenza says. "Streaming was going up, and Shazam reaction was instantaneous. We thought we had a radio song, radio started playing it and it solidified what our feelings were: This is a song that is connecting. Then, the research kicked in, and that helped us fight back with naysayers who said, 'We just don't play country.' One-by-one, they came on."

"The Bones" is Morris' second Adult Pop Songs No. 1, in as many visits to the chart. Dance-pop smash "The Middle," with Zedd and Grey, reigned for seven weeks beginning in May 2018.

"The Bones" is from Morris' second LP, GIRL, which debuted at No. 1 on Top Country Albums and No. 4 on the all-genre Billboard 200 in March 2019 and has earned 636,000 equivalent album units through April 2. Since its release, the song has drawn 1.2 billion in cumulative, all-format radio reach and 320 million on-demand U.S. streams and sold 219,000 downloads.

Along with its latest airplay chart coronation, on the April 11-dated all-genre, multi-metric Billboard Hot 100, "The Bones" hits a new No. 14 high. It tops Hot Country Songs (which employs the same chart formula) for a fifth week.

"The fans have spoken on this one," Morris (now a new momrecently told Billboard. "It's a real, gritty love song that I wrote years ago [with Jimmy Robbins and Laura Veltz sharing co-write credits]. I couldn't be more proud that it's become one of the biggest songs of my career to-date."

Cosenza muses that the song's 45-week climb to No. 1 on Adult Pop Songs is a testament to its slow and steady growth and mirrors the metaphor central to its lyrics. "It's a strong message about relationships," he says. "If you've got a great base, you can grow from there. We did that with this song."