Singer Shawn Mendes has revealed that there's one thing he's really scared of now that he has found fame as a recording and performing artist. 

The young Canadian heartthrob took to his official Twitter page and told his followers that he often worries that he will wake up one day to find that people have stopped being interested in his music:

"It's insane how quickly my state of mind changes, one minute everything's chill and the next the world is about to explode. LMAO. I feel like the scariest thing as an artist is the constant worry that things may fall apart one day."

The 'Stitches' hitmaker went onto add that he has to try and remember that nothing is guaranteed and to just enjoy moments as they unfold: "The hardest and one of the most important things i have to remind myself is that life has ups and downs thats inevitable."

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Watch footage of Mendes surprising a superfan here: