Adele's 'Hello' Ties 'Rolling in the Deep' for Her Longest-Leading AC Chart No. 1

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Adele performs at The SSE Hydro on March 25, 2016 in Glasgow, Scotland.

At 19 weeks, "Hello" matches her prior longest reign on the radio ranking.

Adele ties a lofty personal best, as her smash "Hello" ranks at No. 1 on Billboard's Adult Contemporary radio airplay chart (dated April 9) for a 19th week, tying for her longest stay atop the ranking. The total matches the 19-week domination of her 2011 No. 1 "Rolling in the Deep."

Adele has also led AC with two other hits: "Deep" follow-ups "Someone Like You" (five weeks, 2011-12) and "Set Fire to the Rain" (11 weeks, 2012).

Only one other act has scored two AC No. 1s that have ruled for at least 19 weeks each: Celine Dion, whose "Because You Loved Me" led for 19 weeks in 1996, and "A New Day Has Come" (21 weeks, 2002). Dion and Adele also boast the most and second-most cumulative weeks at No. 1 in the chart's nearly 55-year history. Dion has spent 87 weeks on top via her 11 No. 1s, the most among women, while Adele is up to 54 weeks in the top spot thanks to her four leaders.

The continued AC command of "Hello" pads the song's haughty chart resume. The ballad previously topped the Billboard Hot 100 (for 10 weeks), Digital Songs, Pop Digital Songs, Streaming Songs, On-Demand Songs, Billboard + Twitter Top Tracks, Dance Club Songs and the Radio Songs, Pop Songs, Adult Pop Songs, Adult Alternative Songs, Adult R&B Songs and Dance/Mix Show Airplay radio-based charts. It made an historic arrival, debuting atop the Nov. 14, 2015, Digital Songs chart (as well as the Hot 100) with a record 1.1 million downloads sold in its first week, according to Nielsen Music.

Adele Tops U.K. Album Chart for 11th Week

Meanwhile, "Hello" follow-up "When We Were Young" has reached No. 6 so far on AC. Both songs are from Adele's album 25, which has spent its first 18 weeks in the Billboard 200's top five, including 10 weeks at No. 1, and has sold 8.5 million copies in the U.S. to date. Like "Hello," 25 made a record-shattering start, bowing with 3.38 million sold in its first frame.

All charts will update tomorrow (March 29) on Billboard.com.