Last time she appeared on Late Night, she was sharing the spotlight with Iggy Azalea. This time, she had the stage to herself.
The British performer - who was featured on Azalea's 'Fancy', and wrote Icona Pop's monster smash 'I Love It' - was finally front and centre last night.
Her new single, 'Boom Clap', features on the soundtrack to The Fault In Our Stars, and has become the first major hit the singer-songwriter has enjoyed in her own right.
Take a look at the performance below - something tells us it won't be long before we're hearing a lot more about her.
For BBC Radio 1's Live Lounge.Read More
Pop princess-in-waiting premieres 'Gold Coins'Read More
'London Queen' is from forthcoming SuckerRead More
British wunderkind also reveals plans for albumRead More
Never a dull moment on shapeshifting major label debut...Read More