It is a previously unheard-of, tremendous achievement for any artist, experts told The Washington Post. Amid the music industry’s changing ecosystem in the age of streaming, the feat could only be pulled off by someone who brings to the table exactly what Swift does: an established stardom, a loyal fan base, a savvy social media strategy and a relentless marketing machine. “This was just a really good album, and she’s one of the most gigantic music stars in the world,” said Steve Knopper, Billboard editor at large. “She also flooded the zone with different versions of the album and pushed it all out there in a week where there wasn’t a ton of competition from other artists. With that combination of things, you can’t go wrong.”