13 Things to Know About the Charts This Week: Post Malone, NF & Rihanna All Earn No. 1s

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Post Malone arrives at the iHeartRadio Much Music Video Awards on June 18, 2017 in Toronto, Canada.

Post Malone and featured artist 21 Savage each earn their first No. 1 on the Billboard Hot 100, as "Rockstar" rises 2-1 (on the list dated Oct. 28).

Plus, NF scores his first No. 1 album on the Billboard 200 with Perception and Tom Petty & the Heartbreakers tally a second week at No. 1 on the Billboard Artist 100.

Here are 13 other things to know about Billboard's charts this week:

1. "Rockstar" becomes the fifth rap No. 1 on the Hot 100 in 2017, tying the record for the most rap No. 1s in any year. Click here to read the story.

2. More "Rockstar" news: in honor of the new leader, we celebrate every No. 1 song on the Hot 100 with "rock" in its title, from Elton John's "Crocodile Rock" to Joan Jett & the Blackhearts' "I Love Rock 'N' Roll" and more. Click here for the full list.

3. Lin-Manuel Miranda's "Almost Like Praying" debuts as the No. 1-selling song of the week and earns the Hamilton creator his first top 40 hit on the Hot 100, opening at No. 20. Click here for details andMiranda's reaction to the launch.

4. Billboard has recapped the first 25 years of the Pop Songs airplay chart (which launched in October 1992) and Rihanna reigns as the No. 1 artist in the ranking's history. Who has the top song? Click here for all details.

5. Speaking of … on the latest Chart Beat Podcast, Gary Trust and Trevor Anderson count down the top 25 hits on the Pop Songs chart all-time, from Britney Spears, Rihanna and more. Plus, radio expert Sean Ross stops by to analyze the current state of the format. Click here to listen.

6. Over on the Pop Shop Podcast, Keith Caulfield and Jason Lipshutz chat with Daya about her latest single "New," songwriting and her move to a major label. Click here to listen.

7. P!nk earns her third No. 1, and first in five years, on the Dance Club Songs chart, as "What About Us" rises 2-1. Click here to read the full story.

8. More P!nk: The pop star is slated to earn her second No. 1 on the Billboard 200 next week with her new set Beautiful Trauma. The album could soar in with the biggest first-week unit total for a woman in 2017 and the fourth-biggest sum overall. Click here to read the Billboard 200 forecast.

9. Thanks to Eminem's viral cypher about President Donald Trump at the BET Hip-Hop Awards on Oct. 10, the rapper returns to the Social 50 chart at No. 3, his highest ranking in four yearsClick here to read the article.

10. For just the second time in 2017, a country song ranks on the Streaming Songs chart, as Kane Brown's "What Ifs," featuring Lauren Alaina, debuts at No. 48. Sam Hunt's "Body Like a Back Road" is the only other country song to hit the chart this year. Click here to read the story.

11. On the Emerging Artists chart, Dame D.O.L.L.A., aka Portland Trail Blazers point guard Damian Lillard, debuts at No. 32 on the strength of his sophomore album, Confirmed. Click here to read the full post.

12. In the latest "Ask Billboard," a recap of Demi Lovato's career album and song sales. Plus Tom Petty & the Heartbreakers' perhaps signature song "American Girl" never hit the Hot 100; is that rare? Click here for the mailbag.

13. In honor of Gord Downie, the late lead singer of renowned Canadian rock group The Tragically Hip, we celebrate the band's history by the numbers on Billboard charts. Click here for the tribute.