Justin Bieber is a busy guy at the moment and it seems that all his touring and partying with the One Direction lads has finally taken its toll on the singer!
Taking to Twitter last night Bieber revealed he was "so sick" and posted a snap of himself looking VERY glum.
Despite his illness the singer thanked his followers for supporting him despite feeling "sick and frustrated".
"Sick and frustrated #beingsicksucks," Justin tweeted "I love my believers. Thanks for making me feel better.
"This is why I love u. When I'm sick u cheer me up thanks for the nice words," Justin also posted along a fans post.
He added: "All the travel and the body finally broke down. Soo sick. Just gonna chill. #nofun."
Justin Bieber tells fans he's 'sick' (Twitter)
Justin Bieber has been on a constant campaign since the release of his Believe album at the start of the Summer.
Last week, Justin Bieber certainly made the most of his time in London this week. From jamming with One Direction's Niall to partying until early hours with Zayn Malik and his girlfriend Little Mix's Perrie Edwards, he barely had a moments rest/
The 'Boyfriend' star, who landed in the UK on Monday (September 10), was photographed leaving his book signing in London.
And the first thing Bieber wanted to do was catch up with Zayn Malik and other friends at the 1D star's house. Bieber and Zayn stayed for around 2 hours before heading out for a bite of good old KFC then back to the house where the teenage lads were greeted by Perrie Edwards.
Justin Bieber certainly didn't seem too pleased to see the old paparazzi hiding in the bushes of the house and tried to grab them according to Splash News.
Those naughty snappers! The singer is currently on a promotional tour of Europe promoting his new book 'Just Getting Started' and appeared at a secret London location to meet fans.
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