Taylor Swift No. 1 on Hot 100, Selena Gomez, Mark Ronson Hit Top 10

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Taylor Swift performs at the annual Victoria's Secret fashion show at Earls Court on December 2, 2014 in London, England.

Swift's 'Blank Space' reigns for a third week, while Gomez and Ronson (with Bruno Mars) land new top 10s.

Taylor Swift's "Blank Space" leads the Billboard Hot 100 for a third week, while two songs enter the top 10, by Selena Gomez and Mark Ronson (with guest Bruno Mars).

As we do each Wednesday, when the sales/airplay/streaming-based Hot 100 is compiled, let's run down the numbers behind the chart's top 10 and more.

"Space," released on Big Machine Records and promoted to radio by Republic Records, holds at No. 1, powered by its fourth nonconsecutive week at No. 1 on the Digital Songs chart with 342,000 downloads sold (up 13 percent) in the week ending Nov. 30, according to Nielsen Entertainment. Aiding the increase: Swift performed "Space" to open the 2014 American Music Awards (broadcast on ABC) on Nov. 23. 

"Space" is just the second song this year to string together at least three weeks of sales of 300,000 or more (after selling 302,000 last week and 328,000 the week before that). Pharrell Williams' "Happy" hit the 300,000-unit mark for seven consecutive weeks in March/April.

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"Space" rules Streaming Songs for a third week, with 14.2 million U.S. streams (essentially even from last week). On Radio Songs, the track pushes 5-3 with a 27 percent increase to 112 in all-format audience, good for the Hot 100's top Airplay Gainer award for a fourth straight week (marking Swift's best streak; she linked three weeks in a row as the top Airplay Gainer with "I Knew You Were Trouble." in early 2013).

Up by 11 percent in overall Hot 100 points, "Space" boasts a nearly 2-to-1 points lead over the chart's runner-up, Meghan Trainor's former eight-week No. 1 "All About That Bass." She could soon score her second top 10: follow-up "Lips Are Movin" leaps 19-13.

Hozier's "Take Me to Church" holds at its No. 3 Hot 100 peak. It tops the subscription services-based On-Demand Songs chart for a fourth week (3.8 million, up 1 percent) and Hot Rock Songs for a seventh week.

Rounding out the Hot 100's top five, Swift's former four-week No. 1 "Shake It Off" rebounds 5-4, swapping spots with Maroon 5's "Animals" (4-5), which rose to No. 3 three weeks ago. "Animals" tops Radio Songs for a third week (137 million, down 3 percent).

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Selena Gomez blasts 20-6 on the Hot 100 with "The Heart Wants What It Wants," her new single from her first best-of set For You, which enters the Billboard 200 at No. 24. Following her performance of the song on the AMAs, it earns top Digital and Streaming Gainer kudos, vaulting 19-5 on Streaming Songs (9.2 million, up 75 percent) and 11-5 on Digital Songs (136,000, up 98 percent). It also debuts on Radio Songs at No. 42 (29 million, up 39 percent).

With its surge, "Heart" ties for Gomez's highest-peaking Hot 100 hit. Her sole prior top 10, "Come & Get It," reached No. 6 in May 2013.

Sam Smith's "I'm Not the Only One" holds at its No. 7 high on the Hot 100, with across-the-board gains in sales (117,000, up 17 percent), streaming (6.1 million, up 14 percent) and airplay (75 million, up 9 percent). Smith performed "Only" on the AMAs with rapper A$AP Rocky.

Mark Ronson notches the Hot 100's other new top 10, as "Uptown Funk!," featuring Bruno Mars, roars 18-8. Following its first full seven-day tracking period after the Nov. 19 premiere of its video, the single enters Streaming Songs at No. 26 with a 77 percent uptick to 4.4 million. It accelerates by 50 percent in sales to 167,000 (holding at No. 3 on Digital Songs) and debuts on Radio Songs at No. 46 (28 million, up 34 percent).

Quick quiz: what milestone does "Uptown Funk!" achieve with its top 10 ascent? (Answer just ahead.)

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Ronson reaches the Hot 100's top 10 for the first time as an artist (and in his first visit with such a billing). It's his third top 10 as a producer, however: he produced Amy Winehouse's "Rehab" (No. 9, 2007) and Mars' "Locked Out of Heaven" (No. 1, six weeks, 2012-13).

Mars achieves his 12th Hot 100 top 10, and first since "Treasure," which peaked at No. 5 in August 2013. Dating to his first week in the top bracket (March 27, 2010, as a guest on B.o.B's "Nothin' on You"), he ties Rihanna for the most top 10s in that span.

Quiz answer: amazingly, given the Hot 100's 56 years of history, "Uptown Funk!" is the first top 10 with the word "funk" in its title. It passes Elton John's "Grow Some Funk of Your Own," which reached No. 14 in 1976, and Parliament's "Tear the Roof Off the Sucker (Give Up the Funk)" (No. 15, also in 1976). Of course, the word "funky" has repeatedly inhabited the top 10, appearing in the names of seven top 10s, including the No. 1s "Play That Funky Music" by Wild Cherry (1976) and "Funkytown" by Lipps, Inc. (1980). (Also notable in "funk" history: Da Brat's "Funkdafied" hit No. 6 in 1994, marking the last top 10 title with any variation of the word "funk" for 20 years, until this week.)

Closing out the Hot 100's top 10, Tove Lo's No. 3 hit "Habits (Stay High)" drops 6-9 and Ariana Grande and The Weeknd's No. 7-peaking "Love Me Harder" slips 9-10 (although with a bullet). Grande and The Weeknd performed "Harder" on the AMAs as a medley with her earlier top 10s "Problem" and "Break Free."

Visit Billboard.com tomorrow (Dec. 4), 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, Dec. 5).