Meghan Trainor backstage at iHeartRadio 2014

Meghan Trainor poses backstage of the iHeartRadio Village in Las Vegas on Saturday, Sept. 20, 2014.

Joseph Llanes

Meghan Trainor's ode to booty beauty, "All About That Bass," spearheads an all-female top five on the Billboard Hot 100 for a third straight week and becomes the new No. 1 on the Radio Songs chart.
 
Meanwhile, R&B/hip-hop crooner Jeremih jumps into the Hot 100's top 10 with "Don't Tell 'Em," featuring YG, and Jennifer Lopez bounds in at No. 18 with her own celebration of curves, "Booty," featuring Iggy Azalea and Pitbull, fueled by a strong start in streaming following the premiere of its video.

It's Wednesday, the day that the sales/airplay/streaming-based Hot 100 is compiled each week, so let's run down the numbers behind the tally's top 10 and more.
 
Below "Bass" on the Hot 100, Taylor Swift's former two-week No. 1 "Shake It Off" holds at No. 2 for a third week; Jessie J, Ariana Grande and Nicki Minaj's "Bang Bang" reaches a new peak (5-3); Minaj's "Anaconda" drops from No. 3 to No. 4; and Azalea's "Black Widow," featuring Rita Ora, slips from its No. 4 peak to No. 5.

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Women, therefore, control the top five exclusively for a third straight week, marking just the ninth week in the Hot 100's 56-year history in which solo women have kept men out of the top five. (It's the 10th including the week of June 30, 1979, when four solo women and one all-female group, Sister Sledge, barred all boys from the region.) The current run of three straight weeks of only women in the top five is the second-longest such streak after a four-week stretch in February/March 1999.

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Trainor's debut Epic Records single rules the Hot 100 fueled by its coronation on Radio Songs, where it rises 3-1 with a 9 percent gain to 134 million in all-format audience, according to Nielsen BDS. "Bass" spends a third week at No. 1 on Streaming Songs, up by 1 percent to 15.7 million U.S. streams, and a fourth week atop the subscription services-based On-Demand Songs chart (4.1 million, up 11 percent), according to BDS. It drops 1-2 after four weeks on top of the Digital Songs chart (282,000 sold, down 10 percent, according to Nielsen SoundScan).
 
As previously reported, "Bass" also crowns the Pop Songs radio airplay chart and passes 2 million downloads sold to date.

Swift's "Shake" keeps at No. 2 on the Hot 100 with top Airplay Gainer honors for the first time, pushing 4-2 on Radio Songs (128 million, up 12 percent). The track rebounds 2-1 for a third week atop Digital Songs (294,000, down 5 percent) and descends 3-5 on Streaming Songs (8.4 million, down 24 percent; the track had soared by 58 percent in streaming in the prior tracking week after a video featuring Kentucky fraternity brothers performing a lip dub to the song went viral on YouTube and Swift Tweeted her clear approval of it.)
 
"Bass" appears comfortable at the Hot 100's pinnacle: it widens its lead over "Shake," dropping by 2 percent in overall chart points, while "Shake" loses a heftier 7 percent of its total.
 
Jessie J, Grande and Minaj's "Bang Bang" powers by 6 percent in total points as it climbs 5-3 on the Hot 100. The collab holds at No. 3 on Digital Songs (144,000, down 2 percent), dips 4-6 on Streaming Songs, but with a 7 percent rise to 8 million, and lifts 13-11 on Radio Songs (81 million, up 14 percent).
 
Minaj's "Anaconda" drops 3-4 on the Hot 100 (having reached No. 2), although it continues scaling Radio Songs (31-30; 41 million, up 8 percent). The track, which samples Sir Mix-A-Lot's five-week 1992 Hot 100 No. 1 "Baby Got Back," tops Hot R&B/Hip-Hop Songs and Hot Rap Songs for a fifth week each.
 
Azalea's "Black Widow" retreats 4-5 on the Hot 100, although it keeps its bullet thanks to a 4 percent points gain. "Widow" jumps 9-7 on Radio Songs (99 million, up 12 percent) and, despite a 5-8 slip on Streaming Songs, it increases by 4 percent to 7.9 million streams.

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Sam Smith's No. 2-peaking "Stay With Me" holds at No. 6 on the Hot 100 (and departs the Radio Songs summit after six weeks); Grande's No. 4 hit "Break Free," featuring Zedd, keeps at No. 7 and leads Hot Dance/Electronic Songs for a sixth week; Charli XCX's "Boom Clap" reaches a new peak (10-8); and Sia's "Chandelier" returns to the top 10 (11-9).
 
Rounding out the Hot 100's top 10, Jeremih darts 12-10 with "Don't Tell 'Em." The cut also reaches the Digital Songs top 10 (11-8; 79,000, up 8 percent) and the Radio Songs top five (6-5; 106 million, up 1 percent). Jeremih lands his third Hot 100 top 10, following his debut "Birthday Sex" in 2009 and "Down on Me" (featuring 50 Cent) in 2011; both reached No. 4. "Don't" featured rapper YG makes his first trip to the top 10.
 
"Don't" additionally brings a former Hot 100 top 10 back to the bracket: it interpolates Snap's "Rhythm Is a Dancer," which rose to No. 5 in January 1993 (when Jeremih was five years old).
 

Just outside the top 10, Lopez launches at No. 18 with "Booty." (Azalea and Pitbull each sport featured billing, as the latter is on the original version, while the former replaces his vocals and appears in the song's video, released on Sept. 18, as well as on its newly-commercially-available remix.) The track, from Lopez's album A.K.A., which debuted on the Billboard 200 at No. 8 in July, bows with 92 percent of its Hot 100 points owed to streaming, as it rockets onto Streaming Songs at No. 3 with 9.2 million streams (up 1,487 percent); 96 percent of its streaming sum is from Vevo on YouTube clicks.

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With her 28th Hot 100 hit, dating to her first, the five-week No. 1 "If You Had My Love," in 1999, Lopez scores her second-highest debut. The 2014 Billboard Icon Award winner began at a better rank only with "On the Floor," also featuring Pitbull, which started at No. 9 and flew to a No. 3 peak in 2011.
 
"Booty," easily the highest-charting Hot 100 entry from A.K.A. ("I Luh Ya Papi," featuring French Montana, and "First Love" peaked at Nos. 77 and 87, respectively) marks Lopez's highest rank since "Dance Again," another pairing with Pitbull, reached No. 17 in May 2012.
 
Visit Billboard.com tomorrow (Sept. 25), when all rankings, including the Hot 100 in its entirety and Digital Songs, Radio Songs and Streaming Songs, will refresh, as they do each Thursday. The latest charts will also appear in the next issue of Billboard magazine (on sale on Friday, Sept. 26).