Swift continues her longest career command with 'Blank Space.' Plus, Mark Ronson's 'Uptown Funk!' crowns Digital Songs.

Taylor Swift's "Blank Space" leads the Billboard Hot 100 for a sixth week, extending her longest stay at No. 1 of her three career leaders. Meanwhile, Mark Ronson's "Uptown Funk!," featuring Bruno Mars, keeps making a play for the summit, taking over atop the Digital Songs chart.

We're guessing that you're a bit busy today, so let's get right to our Wednesday tradition: running down the top 10 and more on the sales/airplay/streaming-based Hot 100.

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"Space," released on Big Machine Records and promoted to radio by Republic Records, logs its sixth week at No. 1 on the Hot 100, furthering Swift's longest Hot 100 rule. Her prior single, and second No. 1, "Shake It Off" spent four weeks on top. Swift's first topper, "We Are Never Ever Getting Back Together," led for three weeks in 2012.

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"Space" stays atop the Hot 100 powered by its sixth week atop Streaming Songs, with 11.4 million U.S. streams (down 6 percent), according to Nielsen Music. It leads Radio Songs for a second week (144 million in all-format audience, up 5 percent). On Digital Songs, "Space" falls to No. 3 after six weeks at No. 1 with a 9 percent slide to 228,000.

Meanwhile, "Space" -- which was included in the CW's airing of iHeartRadio's "Jingle Ball" concert special on Dec. 18 -- parent album 1989 returns for a sixth week at No. 1 on the Billboard 200. (It beat Nicki Minaj's The Pinkprint, which debuts at No. 2.)

Hozier's "Take Me to Church" tallies a third week at its No. 2 highpoint on the Hot 100. The track tops the subscription services-based On-Demand Songs chart for a sixth week (5 million, down 1 percent); holds at No. 2 on Digital Songs (244,000, up 21 percent); and rises 3-2 on Streaming Songs (9.8 million, up 3 percent) and 9-5 on Radio Songs (91 million, up 17 percent). Greatly helping its cause: Hozier sang "Church" on the Dec. 16 season finale of NBC's The Voice.

On the Hot Rock Songs chart, "Church" dominates for an eighth week.

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Ronson's "Funk!" keeps at its No. 3 peak on the Hot 100, surging 3-1 on Digital Songs with a 69 percent blast to 288,000, also aided by his and Mars' performance of the song on the season finale of The Voice. Ronson is the first male soloist to top Digital Songs with a first chart entry (as a lead) since Sam Smith's "Stay With Me" led for two weeks in July. Mars, meanwhile, scores his seventh Digital Songs No. 1, tying him with Britney Spears for fifth place among acts with the most. Rihanna leads with 13, followed by Katy Perry (10) and Eminem and Taylor Swift (nine each).

Ronson and Mars' appearance on The Voice likewise helps spur the song's 15-7 vault on Streaming Songs (7.9 million, up 27 percent) and its 17-11 charge on Radio Songs (63 million, up 28 percent).

"Funk!" claims the Hot 100's three top Gainer awards (Digital, Streaming, Airplay), marking just the fifth title to sweep all three categories in the nearly three years of their side-by-side existence. It joins Meghan Trainor's "All About That Bass" (Sept. 20); Iggy Azalea's "Fancy" (featuring Charli XCX) (May 17, June 7); Pharrell Williams' "Happy" (March 22); and Robin Thicke's "Blurred Lines" (featuring Williams and T.I.) (June 22, Aug. 17, 2013). (All four of those songs topped the Hot 100.)

Ed Sheeran shoots 6-4, a new peak, on the Hot 100 with "Thinking Out Loud," another song assisted by the finale of The Voice, on which Sheeran sang the ballad. It bullets for a second week at No. 4 on Digital Songs with a 55 percent increase to 214,000. On Streaming Songs, it bounds 17-8 (7.4 million, up 20 percent) to become his first top 10 on the tally. "Loud" leaps 45-28 in its second week on Radio Songs (39 million, up 41 percent).

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Rounding out the Hot 100's top five, Trainor's second top five Hot 100 hit "Lips Are Movin" backtracks 4-5 (after leaping 8-4 last week), but with a bullet. The Dec. 22 birthday girl performed it on -- of course! -- The Voice's season finale. It pushes 5-3 on Streaming Songs (8.6 million, up 9 percent); slips 5-6 on Digital Songs despite a 31 percent gain to 152,000; and climbs 23-18 on Radio Songs (50 million, up 14 percent).

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Meanwhile, Trainor's breakthrough smash "Bass" falls 7-10. It led the Hot 100 for eight weeks, around which she wrapped seven weeks at No. 2. As reported in yesterday's "Ask Billboard" reader mailbag, that longevity makes "Bass" one of just six songs in the Hot 100's 56-year history to spend at least 15 weeks in the chart's top two spots (and the first debut hit to do so).

Also in the Hot 100's top 10: Smith's "I'm Not the Only One" backtracks from its No. 5 high to No. 6 (keeping its bullet); Ariana Grande and The Weeknd's "Love Me Harder" returns to its best rank (9-7); Nick Jonas' "Jealous" returns to the region at its peak-to-date (11-8); and Maroon 5's No. 3-peaking "Animals" descends 8-9.

Visit Billboard.com tomorrow (Dec. 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.