Is there anything Beyonce does that we don’t want to copy? Nope. Let’s go ahead and call her Grammy hair “the bob heard round the world.” When Queen B took the stage to perform “Drunk in Love” with her husband last Sunday night it was wet and sexy; when she emerged post-performance in a sheer Michael Costello dress, it was full and curly. Two days later, celebrity hair stylist Mara Roszak debuted Kate Mara’s choppy new bob on Instagram (and if you look closely in the comments you’ll see a string of starlets saying, “I want it!”). By Wednesday, Jessica Alba had chopped her long locks to just below shoulder length, inching toward what’s quickly becoming the must-have haircut. Find out who’s ahead of the trend, above.