Justin Bieber No. 1 on Billboard Artist 100, Rihanna Roars to No. 2

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Justin Bieber performs during Power 96.1's Jingle Ball 2015 at Philips Arena on Dec. 17, 2015 in Atlanta, Georgia.  

Bieber leads again, while Rihanna, Kevin Gates, Zayn & Charlie Puth all hit the top 10.

Justin Bieber is again the top musical act in the U.S., as he ranks at No. 1 on the Billboard Artist 100 chart (dated Feb. 20).

The Artist 100 measures artist activity across Billboard's most influential charts, including the Billboard Hot 100 songs chart, Top Album Sales and the Social 50. The Artist 100 blends data measuring album and track sales, radio airplay, streaming and social media fan interaction to provide a weekly multi-dimensional ranking of artist popularity.

Bieber places at the Artist 100 summit for a sixth total week; he's notched all his weeks at No. 1, and remained in the top two, since Nov. 28, when he first reached the top spot. His album Purpose arrived atop the Billboard 200 and Top Album Sales the following week. Streaming marks his greatest slice of Artist 100 points (25 percent), followed closely by radio airplay (22 percent), social reaction and song download sales (21 percent each).

Rihanna's 'Anti' Rules at No. 1 on Billboard 200 Albums Chart

Below Bieber, Rihanna blasts into the Artist's 100 top 10 (16-2), having previously peaked at No. 11. She soars by 279 percent in overall activity, as her new set Anti opens at No. 1 on Top Album Sales with 124,000 copies sold in the tracking week, according to Nielsen Music, and vaults 27-1 on the Billboard 200. Album sales account for her greatest share of Artist 100 chart points (58 percent), followed by digital song sales (30 percent), as lead Anti single "Work" (featuring Drake) jumps by 23 percent to 156,000 downloads sold.

Rounding out the Artist 100's top five, Adele dips 2-3; Drake holds at No. 4; and Kevin Gates vaults 61-5 (up 543 percent), as his LP Islah debuts at No. 2 on Top Album Sales (93,000).

Zayn's 'Pillowtalk' Debuts at No. 1 on Hot 100

Also new to the Artist 100 top 10, Zayn zooms 39-6 (up 278 percent), with 60 percent of his activity from digital song sales, as "Pillowtalk" opens atop the Hot 100 and Digital Songs, with 267,000 downloads sold. (It also launches at No. 1 on Streaming Songs with 22.3 million U.S. streams.)

Charlie Puth additionally hits the Artist 100's top 10 (31-10; up 142 percent), after previously peaking at No. 30 in April 2015, as his debut LP Nine Track Mind enters Top Album Sales at No. 5 with 47,000 sold.

Check out the entire Artist 100 here.