Gary Barlow is an international star who travels all over the world but he's admitted that he's afraid of flying.
The singer is about to tackle his fear head on and has signed up for a course to help him overcome his phobia.
Other stars have had to confront their fears too: Niall Horan suffered from claustrophobia as did Justin Bieber.
And both Pirates of the Caribbean star Johnny Depp and Harry Potter's Daniel Radcliffe have confessed to being frightened of clowns!
We asked you what fears you've faced and how you've overcome them.
This chat page is now closed but you can read a selection of your comments below.
I overcame my fear of snakes at a festival, by holding and touching snakes!
I overcame my fear of heights when I went up the Eiffel Tower in Paris. The view was amazing and as soon as I came down I wanted to go up there again!
To overcome my fears I think of all the things I've already achieved in my life.
Ellie, Northampton, England
I'm really scared of talking in front of groups of people, I always think that if I make a mistake everyone will laugh. I overcame my fear when I had to do a presentation in front of 400 people at my school, I just focused on myself rather than what other people were thinking.
Amy, London, England
I overcame my fear of heights when I went rock climbing on a school trip.
Grace, Plymouth, England
I've overcome my fear of dogs!
Shazia, London, England
I was scared of wasps, bees or any type of insect that flies, I overcame this fear by going on a school trip to the jungle.
Tasnim, London, England
I overcame my fear of spiders and now I am not that scared of them anymore. I have also overcome my fear of heights, last year when my school went to stay at a PGL activity site, I was the first to go abseiling!
Olinka, Hampshire, England
I overcame my fear of bats on a school trip, now I don't have any fears at all.
Olivia, Northern Ireland
I have overcome my fear of performing in front of people. I performed in the school Comic Relief talent show.
Emily, Cleckheaton, West Yorkshire
I was terrified of spiders and then in year 6 I got over the issue by being the only girl to pick up a tarantula!!
Amina, Bradford, England
My one was when I had to climb a mountain in Wales, it was very scary!
Mohamed, Birmingham, England
I've overcome my fear of spiders.
Ethan, Cardiff, Wales
I overcame my fear of heights when I was invited to an abseiling party. At the top I was very scared but when I got to the bottom I wanted to do it all over again!
Ben, Berkshire, England