Gaga earns her fourth No. 1 and first since "Born This Way" in 2011.

Lady Gaga and Bradley Cooper's "Shallow" blasts from No. 21 to No. 1 for its first week atop the Billboard Hot 100 songs chart. "Shallow" surges following the 91st Academy Awards Feb. 24, when the pair performed the ballad, from the box office hit A Star Is Born, in which they star and which Cooper directed, and it won for best original song.

"Shallow," Gaga's fourth Hot 100 No. 1, and first since 2011, and Cooper's first, dethrones Ariana Grande's "7 Rings" after five weeks atop the chart.

Meanwhile, as "Shallow" is the top-selling song of the week and "Rings" is the most-streamed, Halsey's former Hot 100 No. 1 "Without Me," now at No. 3, takes over as the most-heard hit on radio.

Plus, J. Cole's "Middle Child" returns to the Hot 100's top five (11-5) after the premiere of its official video and Blueface earns his first top 10, with "Thotiana" (13-9).

Let's run down the top 10 of the Hot 100 (dated March 9), which blends all-genre U.S. streaming, radio airplay and digital sales data. All charts will update on Billboard.com tomorrow (March 5).

Gaga and Cooper's "Shallow," released on Interscope Records, vaults to the Hot 100's summit for the first time, from No. 21 in its 22nd week on the list. It had previously hit a No. 5 high, in its second frame (Oct. 20, 2018). It becomes the 1,084th No. 1 in the chart's 60-year history.

Gaga earns her fourth Hot 100 No. 1 and first in nearly eight years, since "Born This Way," which led for six weeks in February-April 2011. "Poker Face" ruled for a week in April 2009 after her debut entry "Just Dance," featuring Colby O'Donis, tallied three weeks on top in January 2009. Cooper achieves his first Hot 100 leader.

Gaga ends the longest gap between Hot 100 No. 1s since Beyoncé, who waited two weeks shy of nine years between "Single Ladies (Put a Ring on It)" in 2008-09 and "Perfect" by Ed Sheeran in 2017-18; she was credited as a co-lead on the latter song for the first five of its six weeks at No. 1, driven by its duet remix.

At 22 weeks, "Shallow" ties for the 10th-longest climb to No. 1 on the Hot 100, matching the rise of "Just Dance" (and Vangelis' "Chariots of Fire," which led in 1982). Los Del Rio's "Macarena (Bayside Boys Mix)" completed a record 33-week trek to the top in 1996.

Flying 21-1, "Shallow" makes the biggest jump to No. 1 on the Hot 100 since XXXTentacion's "Sad!" soared 52-1 on the June 30, 2018-dated chart, following his June 18 death. ("Shallow" is the second song ever to hike exactly 21-1, after Usher's "U Remind Me" in 2001.)

No. 1 in sales: "Shallow" rebounds 2-1 on the Digital Song Sales chart, for a seventh total week on top (extending Gaga's longest command of her six career No. 1s on the chart), up 225 percent to 115,000 sold in the week ending Feb. 28, according to Nielsen Music.

The sum is the best since Drake's "In My Feelings" also sold 115,000 (although slightly more than "Shallow" before rounding off), as reflected on the chart dated last July 28; a week later, it sold 104,000, the last frame in which a song sold over 100,000 until "Shallow." (Thus, this week ends a span of 30 weeks without a six-digit seller; in brighter days for download sales, the top-selling song sold at least 100,000 each week from Feb. 10, 2007 through Sept. 5, 2015.)

First week in Steaming Songs top 10: "Shallow" re-enters the Streaming Songs chart at No. 9, marking its first week in the top 10 (27.3 million, up 185 percent, in the week ending Feb. 28), after reaching a prior No. 28 high in October. Aiding the song's streaming sum for the week was the video, uploaded to Gaga's official YouTube channel, of her and Cooper's performance of it at the Oscars. She adds her third Streaming Songs top 10 and first since 2013, while he collects his first.

On the Radio Songs chart, "Shallow" also hits a new high, leaping 37-27, up 30 percent to 34.8 million audience impressions in the week ending March 3.

Best original song winners atop the Hot 100: "Shallow" had been tied with Idina Menzel's' No. 5 Hot 100 hit "Let It Go," from Frozen, in 2014, for the top-charting best original song Oscar winner in 16 years. Now, "Shallow" is the first such No. 1 since Eminem's "Lose Yourself" (from 8 Mile), which ruled for 12 weeks in 2002-03. "Shallow" is the first duet best original song winner to reign since Peabo Bryson and Regina Belle's "A Whole New World (Aladdin's Theme)," which led the chart 26 years ago (March 6, 1993).

Overall, "Shallow" is the 17th best original song recipient to crown the Hot 100, dating to the first, "Raindrops Keep Fallin' on My Head," by B.J. Thomas, in 1970. One of those 17 No. 1s is Barbra Streisand's 1977 leader "Evergreen," the love theme from the 1976 adaptation of A Star Is Born.

Gaga, Cooper No. 1 on Billboard 200, too: As previously reported, Gaga and Cooper's A Star Is Born soundtrack rebounds for a fourth week at No. 1 on the Billboard 200 albums chart. Star and "Shallow" mark the first soundtrack and a single from it to top the Billboard 200 and Hot 100 simultaneously since April 25, 2015, when Furious 7 rose 2-1 on the former and Wiz Khalifa's "See You Again," featuring Charlie Puth, began a 12-week Hot 100 command.

Grande's "7 Rings" drops to No. 2 on the Hot 100 after spending its first five frames at No. 1. Still, it leads Streaming Songs for a sixth week, with 43.9 million U.S. streams, down 1 percent. "Rings" rises 6-4 on Radio Songs, up 13 percent to 80.8 million audience impressions, as it claims the Hot 100's top Airplay Gainer award for a fifth week. It dips 3-5, after posting three weeks at No. 1, on Digital Song Sales (23,000 sold, down 15 percent).

With the retreat of "Rings," Grande's second Hot 100 No. 1, she remains two weeks from matching her longest reign, as her first leader, "Thank U, Next" (down 4-7 this week), dominated for seven weeks beginning with its No. 1 debut on the chart dated Nov. 17.

Halsey's former two-week Hot 100 No. 1 "Without Me" slips 2-3 on the Hot 100 but ascends to No. 1 on Radio Songs (107.7 million, essentially even week-over-week). Halsey achieves her second Radio Songs ruler and first in a lead role, after she topped the chart for 11 weeks in 2016 as featured on The Chainsmokers' "Closer." "Without Me" halts the 14-week Radio Songs reign of Panic! at the Disco's "High Hopes" (which departs the Hot 100's top 10, falling to No. 11 from No. 9).

Post Malone and Swae Lee's former Hot 100 leader "Sunflower (Spider-Man: Into the Spider-Verse)" backtracks 3-4, while leading the Hot R&B/Hip-Hop Songs and Hot Rap Songs charts for a ninth week each.

J. Cole's "Middle Child" bounds 11-5 on the Hot 100, after reaching No. 4 (Cole's career-best rank) four weeks earlier. It jumps 6-2 on Streaming Songs (39.4 million, up 25 percent) following the Feb. 25 premiere of its official video. It ranks at No. 19 on Digital Song Sales (12,000, up 4 percent) and enters Radio Songs at No. 48 (21.8 million, up 12 percent).

Marshmello and Bastille's "Happier" holds at No. 6 on the Hot 100, after reaching No. 2, as it leads Hot Dance/Electronic Songs for a 24th week; Grande's "Next" drops 4-7 on the Hot 100; and Post Malone's "Wow." returns to its No. 8 high from No. 10, as it becomes his fifth Radio Songs top 10 (11-9; 58.9 million, up 10 percent).

Blueface earns his first Hot 100 top 10, as his debut entry "Thotiana" climbs 13-9. The track by the Los Angeles-based rapper (real name: Jonathan Porter), which sports remixes with Cardi B and YG and a pair of Cole Bennett-directed official videos, charges 9-4 on Streaming Songs (37.8 million, up 24 percent) and lifts 14-13 on Digital Song Sales (15,000, up 15 percent).

Capping the Hot 100's top 10, Travis Scott's former No. 1 "Sicko Mode" slides 7-10.

Find out more Hot 100 news on Billboard.com this week, and, for all chart news, you can listen (and subscribe) to Billboard's Chart Beat Podcast and Pop Shop Podcast and follow @billboard and @billboardcharts. And again, be sure to visit Billboard.com tomorrow (March 5), when all charts, including the Hot 100 in its entirety, will refresh. The next issue of Billboard magazine is on sale Friday (March 8).