Little Mix performed at the Apple Music Festival today at London's Roundhouse, nabbing the opening slot to One Direction's headlining show.

Not content to simply perform a set list bereft of any surprises, Little Mix made the best of their 20-minute set, debuting a brand new track off their upcoming third studio album Get Weird. The song, titled "Grown," is a sassy pop track that maintains the kind of subtle, retro sound present in that 15-second snippet of their upcoming single "Love Me Like You."

Little Mix have always been quick to capitalize on the whole girl-power trope that helped catapult predecessors like Spice Girls to massive success, and with good reason: They're in top form with “Grown,” an undeniably catchy track where they say peace out to a guy -- sorry, a boy -- who can't handle them. Jesy sings, "You're washed up and now I'm in a different league / Trying way too hard and I don't need your flattery." 

The group also performed an a capella version of a super short snippet of "Love Me Like You," which they teased last week on Twitter and Instagram last week, and another track off Get Weird called "The End."

This time there were no tears from Perrie, who suffered a slight gaffe mid-performance when the group performed the track during a recent livestream in New York City. But no matter -- Perrie's moved past Zayn all that, you know?

Check out the video of Little Mix performing "Grown" above.

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