Triston Daley's List: YouTube Activity Adds to Billboard's Hot 100

Fittingly, "Harlem Shake," the viral smash from Brooklyn producer Baauer, roars onto the ranking at No. 1. "Shake" became just the 21st song to debut at No. 1 on the Hot 100 since 1958. Even more notably, it's the first song to start at the summit by an artist essentially unknown prior to charting. And it also blasts onto the Digital Songs chart at No. 3 with 262,000 downloads sold.

As "Shake" takes over atop the Hot 100, it dethrones Macklemore & Ryan Lewis' "Thrift Shop" after a four-week reign. Still, "Shop" leads Hot Digital Songs for a sixth week, scoring its highest weekly sum with 412,000 downloads so far. On Radio Songs, "Shop" bullets again at No. 4 with 111 million impressions. And it leads Hot R&B/Hip-Hop Songs for a sixth week.

Beyond the flurry of activity atop the Hot 100, Rihanna adds her own headlines at No. 3, as "Stay," vaults with top Digital Gainer honors from No. 57 in its second week on the chart. After she performed the ballad at the Grammy Awards on Feb. 10 and subsequently released its video, it bounds from 25 to 2 on Hot Digital Songs and debuts on Streaming Songs at No. 7. On Radio Songs, it lifts from 74 to 57.

Will.i.am and Britney Spears' "Scream & Shout" slips from 3 to 4 on the Hot 100. It climbs from 6 to 5 on Radio Songs and from 7 to 4 on Streaming Songs, but plummets from 2 to 10 on Digital Songs. And it passes 2 million downloads sold to date.

Taylor Swift's No. 2-peaking "I Knew You Were Trouble." stays at No. 5. It leads Radio Songs for a second week and falls from 5 to 11 on Digital Songs and starts a No. 10 for the track on Streaming Songs this week.