1) The week before: Justin Bieber’s comeback effort Purpose had the highest-selling debut week of 2015; it sold 522,000 copies and 649,000 equivalent album units. He did not hold onto that title for long.
2) In 2000: *NSYNC’s No Strings Attached, sold 2,416,000 in it’s first week at the music industry’s peak. Adele just broke that record earlier today and the week isn’t even out.
3) The other pop princess: Taylor Swift’s 1989 has sold 5.35 million copies in the 13 months since it came out. Adele sold nearly half that in two days.