Little Mix were 'worn out' earlier this year after busy schedule
Little Mix say they were left tired and unmotivated earlier this year after working flat-out for months.
The group told the Guardian that they were given time off to recuperate.
Jesy Nelson said: "We were worn out.
"We were tired and we needed to get excited about wanting to work again."
Little Mix have released three albums since they appeared on the X Factor in 2011.
Their fourth effort 'Glory Days' will land on November 18.
Watch Little Mix perform live below:
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