This girl knows how to sing. Watch UK superstar Jess Glynne perform her smash hit “Don’t Be So Hard On Yourself” on stage at our iHeartRadio LIVE below…

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Listen to Jess Glynne on iHeartRadio here.

Want more? Here's one of our fave moments from Jase & PJ – they’re always up to something! Weekdays from 6AM on KIIS 101.1!