Hairstylists have gotten requests from patrons for pixie cuts similar to Watson's and "the Bieber swish", according to the Wall Street Journal.
The My Week with Marilyn actress cut her long locks to a crop last year.
The two young stars' dos also are apparently the most searched celebrity haircuts on Google.
Watson called her haircut as the "most liberating thing".
"The stylist just grabbed the back of my hair and took a whole ponytail of hair out," she shared. "It felt amazing. I love it."
The publication also named the wedding of Prince William and Kate Middleton as the "fashion event of the year", while the 'Most Overrated Fashion Faux Pas' went to First Lady Michelle Obama's Alexander McQueen dress at a state dinner and Kim Kardashian was named the 'Most Spectacular Bridal Fiasco'.
Watch the trailer of My Week with Marilyn below: