Songstress Charli XCX has cancelled the second leg of her 'Charli and Jack Do America Tour' because she's feeling 'drained', 'restless' and 'unable to write'. 

She took to her official Twitter page over the weekend and explained that she has decided to call off the rest of the tour: "I'm sorry to say that the 2nd leg of the Charli and Jack do America Tour is not happening... here is the reason why. I love Jack forever. He's a great friend & I know he understands. I am so sorry to all of the fans and angels who had tickets."

The 'Boom Clap' star then issued a statement on her decision, which reads: "I have some bad news. Regrettably I will not be continuing my spot on the “Charli and Jack Do America Tour” this coming autumn. For personal reasons I will not be able to continue this tour."

"These personal reasons include the fact that I need to be creative. Artists tour for a really really long time and I have been on the road for a while now, probably not as long as some, but for me it feels like an eternity. I am struggling to create whilst I'm on the road and that is making me unhappy."

"As an artist I need to move quickly and write a lot to not feel restless. Sometimes touring really puts me in this isolated world where I feel down and sad but primarily I struggle to multitask and write songs at the same time which is what I need to do to feel OK. I never want to do a show where I just feel like I'm going through the motions. I want to perform and feel alive and like I want to be there and if I force myself to do this, I will not perform a great show for you."

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Watch footage of Charli XCX performing live here: