As previously reported, "Boyfriend" registered a history-making bow on the mainstream top 40-based Pop Songs radio airplay chart, launching with 3,961 first-week plays, the best first-week plays sum for a song by a male artist in the chart's almost 20-year archives.

With its No. 2 start, Bieber notches his highest Hot 100 placement. He had previously ranked as high as No. 5 when "Baby" debuted (and peaked) at No. 5 the week of Feb. 6, 2010. (He boasts one other Hot 100 top 10: "Never Say Never" (No. 8, 2011), featuring Jaden Smith.)

Despite the massive first-week numbers for "Boyfriend," fun.'s "We Are Young" leads the Hot 100 for a fifth week. The song slips 1-2 on Digital Songs with 363,000 downloads sold (down 6%). On Radio Songs, "Young" pushes 4-2 with 104 million audience impressions (up 19%), enough to give the song top Airplay Gainer honors on the Hot 100 for a fifth consecutive week.

A notable factor in the chart battle between "Boyfriend" and "Young" is the latter song's upper hand in streaming. "Young" remains atop the On-Demand Songs chart with 1.18 million on-demand streams (flat from last week) in the chart's tracking week, according to BDS.

"Boyfriend," however, logs almost no streaming points among its Hot 100 points total due to its lack of availability on most streaming services during the tracking week, which ended Sunday. Also granting an edge to "Young," albeit slight, was the song's availability at all digital retailers, while "Boyfriend" was released as an iTunes-exclusive track.

Below the tightly-contested fight to the finish atop the Hot 100 this week, other action abounds.

Gotye's "Somebody That I Used to Know," featuring Kimbra, rises 4-3. The collaboration, which tops Alternative Songs for a seventh week, dips 2-3 on Digital Songs but with a 17% gain to 244,000 downloads sold. It advances 20-16 on Radio Songs (52 million, up 23%) and remains at No. 2 on On-Demand Songs (961,000, up 10%).

U.K. boy band the Wanted slips 3-4 on the Hot 100 with "Glad You Came." The song falls 3-8 on Digital Songs (169,000, down 8%) but continues its ascent on Radio Songs, where it climbs 6-4 (95 million, up 15%). On On-Demand Songs, "Glad" descends 3-4 but with a 3% uptick to 645,000.

Kelly Clarkson's former three-week No. 1 "Stronger" rounds out the Hot 100's top five, dropping 2-5. Nicki Minaj's "Starships" slides 5-6 and Flo Rida's "Wild Ones," featuring Sia, and Katy Perry's former leader "Part of Me" hold at Nos. 7 and 8, respectively.

Two pure pop acts, meanwhile, score Hot 100 top 10s in their first chart appearances.

One Direction, the top tier's other British boy band phenomenon in addition to the Wanted, jumps 11-9 with "What Makes You Beautiful." The song rises 7-5 on Digital Songs (199,000, up 22%), 53-42 on Radio Songs (32 million, up 21%) and 15-11 on On-Demand Songs (476,000, up 22%).

At No. 10, Carly Rae Jepsen's "Call Me Maybe" darts from No. 18 as the Hot 100's top Digital Gainer. The track roars 9-7 on Digital Songs (182,000, up 32%), debuts on Radio Songs at No. 73 (15 million, up 80%) and jumps 5-3 on On-Demand Songs (662,000, up 24%). The song's success is yet another sign of Bieber's influence, as, as previously reported, he has championed "Maybe" through various forms of social media.

"Maybe" recently spent four weeks at No. 1 on the Billboard Canadian Hot 100. This week, "Boyfriend" opens atop Bieber's home country's signature chart, marking his first Canadian Hot 100 No. 1.