Justin Bieber has spent the past decade and a half becoming one of Hollywood’s most eccentric (and GQ’s most celebrated) dressers, an accolade he earned in no small part thanks to superstar celebrity stylist Karla Welch, whom the Canadian pop star began working with in 2011. Back then, Bieber entered his post-teen-heartthrob era with a gonzo—and, at times, perilous—new lease on life, which was accompanied by a boundary-pushing new wardrobe.
Under Welch’s fashion tutelage, Bieber…

