Justin Bieber's "Sorry" finally reaches the top slot on the Billboard Hot 100 after spending eight weeks at No. 2. To win the top spot, Bieber knocks Adele's "Hello," which spent 10 consecutive weeks at No. 1, down a notch. The two tracks debuted the same week back in November with "Hello" debuting at No. 1 and "Sorry" at No. 2. This is a huge win for Justin as it also marks his second chart-topping single ever after "What Do You Mean?" debuted at No. 1 last September.