Mental health problems affect one in four of us in the UK according to the charity Mind. And they don't take into account how rich/successful/attractive/famous you may be, which means some of our favourite stars suffer too.
These celebrity quotes will instantly make you feel less alone…
1. Taylor Swift on anxiety
"I'm always terrified that something's going to happen. And I'm not going to be able to do this anymore and it's all going to end in one day. Part of the fear comes from loving this so much and not wanting to lose it."
2. Lena Dunham on OCD
"I have obsessive compulsive disorder and it started manifesting itself when I was three... I have only the vaguest memory of life before fear. [Exercise] helped my anxiety in ways I never dreamed possible."
3. Emma Stone on panic attacks
"The first time I had a panic attack, I was sitting in my friend's house and I thought the house was burning down. I called my mom and she brought me home, and for the next three years it just wouldn't stop."
4. JK Rowling on depression
"It's difficult to describe depression to someone who's never been there because it's not sadness. I know sadness. Sadness is to cry and to feel. But it's that cold absence of feeling – that really hollowed-out feeling."
5. Demi Lovato on anxiety and Bipolar Disorder
"Sometimes I'm not always doing amazing, but that's okay… Because everyone struggles and it's okay to be flawed – that's what makes me, me."
6. Jennifer Lawrence on anxiety
"I just try to acknowledge that the scrutiny is stressful, and that anyone would find it stressful. So I've got to try to let it go, try to be myself, and focus on important things."
7. Beyoncé on depression
"Now that I was famous, I was afraid I would never find somebody again to love me for me. I was afraid of making new friends. Then one day my mom said: 'Why do you think a person wouldn't love you? Don't you know how smart and sweet and beautiful you are?' That's when I decided I only have two choices: I can give up, or I can go on."
8. Sia on anxiety
"I have social anxiety. It's easier being up on stage because there's security in being there. When I'm off stage, I'm trying not to be a manic freak. I'm quite shy."
9. Lady Gaga on depression and anxiety
"I learned that my sadness never destroyed what was great about me. You just have to go back to that greatness, find that one little light that's left. I'm lucky I found a glimmer stored away."
10. Adele on anxiety
"I have anxiety attacks, constant panicking on stage. My heart feels like it's going to explode because I never feel like I'm going to deliver, ever."
11. Zoella on panic attacks
"I'm constantly having a battle with myself. But you do have control over your body. You have to think of the worst-case scenario and how that's not going to happen. You're not going to die. You can do this."
12. Miley Cyrus on depression
"So many people look at [my depression] as me being ungrateful, but that is not it. I can't help it…There's nothing worse than being fake happy."