The new countdown is the first to feature YouTube streaming data as part of the hit list's methodology and therefore it's fitting that the New York-based Internet sensation has scored the new number one.
Baauer, real name Harry Rodrigues, becomes only the 21st artist to debut at the top since 1958, when the current chart format was launched - but he is the first essentially unknown act to crash in at number one.
Harlem Shake ends rap duo Macklemore & Ryan Lewis' four-week reign at the top of the chart with Thrift Shop, which drops to two, just ahead of surging birthday girl Rihanna, who jumps up the countdown from 57 to three with her ballad Stay.
It's a good week for the R&B star - she celebrated her 25th birthday in Hawaii with boyfriend Chris Brown and pals on Wednesday.
Stay is Rihanna's 24th top 10 on the chart, placing her ahead of Whitney Houston and the Rolling Stones on the all-time top 10 list. She's now ninth on that countdown - one hit behind Elvis Presley and three behind Sir Elton John, Mariah Carey and Janet Jackson.
Will.i.am and Britney Spears' Scream & Shout and Taylor Swift's I Knew You Were Trouble round out the new top five.
Fans, critics react to Kanye West's 'Yeezus' Holy Yeezus, Kanye’s new album has a lot of tongues waggin’ and fingers tappin’ today. Now that it has officially dropped, fans and critics alike are chiming in across the world – some calling it “an abrasive ode to himself,” ... Read more
Drake announces North American tour Drake is going to have one hell of a busy fall. The Toronto-bred hip-hop superstar has booked a three-month, 42-city North American tour, including a slew of Canadian dates. The trek, dubbed Would You Like A Tour?, starts south of the border in Portland ... Read more
Recapping Governors Ball 2013 We hope you packed your galoshes! The remnants of Tropical Storm Andrea drenched New York City this past weekend, creating a muddy environment for the thousands of fans that attended the Governors Ball music festival, a three-day extravaganza at NYC's ... Read more