We spotted Sienna Miller, who is about to take over from Emma Stone in Cabaret on Broadway, showing her support for Alexa's new collection as she ran errands in NYC wearing the super-popular grey slogan sweatshirt, which she paired with a leggings and a cosy ooking parka.
We can't think of many other people to better advertise Alexa's range of laid-back denim pieces than the ever-stylish Ms Miller.
Alexa's good pal Daisy Lowe also chose to wear the sweater to the launch night at Selfridges last night, teaming it with a pair of skinnies and knee-high boots.
And not forgetting this brooding black and white shot of Laura Bailey, who shared a snap of herself in the slogan sweater on Instagram to help promote her friend's new range.
So, it looks like we've already found the slogan sweater everyone's going to be wearing for 2015, and it's still only January.