Get Ariana's signature half ponytail.

WATCH: Get Ariana Grande’s Grammys Half Ponytail

It’s official, Ariana Grande is our 2015 hair inspo. Rocking her signature half-up ponytail at last night’s celeb-filled Grammy awards, Ariana showed that when it comes to evening updos, there’s nothing chicer (or easier) than a polished pony. And we’ve found out exactly how to achieve her red-carpet ready look, just in time for Valentine’s Day. You can thank us later.

We caught up with celeb fave hairstylist, Lisa Laudat, who showed us just how easy it is to create the look. Her top tip for a perfect do’? Tons of volume, body and bounce. But if, like us, you weren’t born with super-thick tresses, don’t worry, we’ll let you in on our little secret for cheating a mega-size mane – hair extensions!

Check out our exclusive step-by-step video with Lisa Laudat below, she used the Beauty Works Clip In Extensions, from £67.99, to create the hairstyle in under 5mins – watch out Ariana Grande! You’ve got competition…