16 Celebs on the Most Useful Advice They've Ever Gotten from Other Stars

"I was like, 'I don't feel any different [after winning an Oscar]. I don't feel better about myself. I still don't feel like I'm a good actress.' She was like, 'Oh, yeah. That's totally normal. I've had the same thing. Don't think of it like that. Think of it as, like, you got your Ph.D. You're certified; that's it. It doesn't change anything. You can still f--- up. Every judge is still human.'"

— to InStyle

"I think what I learned from Bradley [is] it's okay to be relentlessly sure of your vision, and to go after it with every fiber of your being, and to never stop white gloving what you're making. Sometimes, as an artist, I second-guess myself when I go, 'Am I pulling the thread? Am I unraveling the whole blanket now? Do I need to stop?' It's changed the way that I work today."

— to Entertainment Weekly

“I give pretty strong advice to costars, like, ‘Dig in deep and don’t sell yourself short.’ And, ‘Don’t confuse someone working for you with them doing you a favor.’ You show up and do your job; it should be the same with agents, managers, the tax guy. Jennifer Coolidge…taught me, ‘The second they stop working for you, fire them.’"

— to Glamour

"You don't want to give people the ability to say 'I had sex with Princess Leia.' "

— to Vogue

"He gave me pearls of wisdom … I started with the show with 81 cents in my bank account, and obviously with Rocky, he of course wrote and it was a whole tumultuous beginning and he had nothing, nobody was going to hire him — he was a professional extra. So I was like, 'We both started from humble beginnings.' And we bonded in that way, and then he said, 'It's so much about resilience and about having a thick skin, and about just kind of continuing and pursuing even if you don't think you're going to make it and just keep going.'"

— on Jimmy Kimmel Live

"As you can imagine I was pretty terrified [during the screen test] and [Downey] came up to me and said, 'Look, I felt exactly the same as you did when I did my test for Iron Man but just relax, let your body take over and, and if it's meant to be it'll happen.'"

— to E! News

"[Hardy] has a lot of time for young actors. I will be forever in debt to him for some of the advice he gave me. He's a very smart man and he understands what it's like when you're starting out. 'Make it just for you,' he sort of said it just like that. And said to play the part like your life depends on it. I spent a whole week with him, he's an absolute sweetheart."

— to PEOPLE

"She was actually at my house the other day and we were sitting by the fire and I was talking about relationships and business in my life and she just kind of looked at me and was like, 'Selena, if you're the smartest person in the room, I think you're going to be in the wrong room.' She thinks I should constantly surround myself with people who are going to make me better, that are going to challenge and motivate me."

— on The Talk

"[Lawrence] said, 'You must do [the Divergent franchise]. You will not regret it for a second. Yes, there are some hard things, but there are so many beautiful things that will come from an opportunity like this.'"

— to The Hollywood Reporter

"Emma Stone was kind of my mentor through [the Golden Globes]. I've been texting with her and talking with her through this whole thing, and she just kept saying to me, 'You're inside the TV!' Now that I'm here, I'm like, 'Oh my gosh, you are inside the TV!' I've watched this every year since I could watch TV… She told me to wash my hands a lot, so I don't get pink eye."

— to Entertainment Tonight

"Bieber told me that you never really know when you're finished [with an album]. He thought he was done [with Purpose] and then got 'Love Yourself' at the last minute. I thought my album was finished, and then I went on a bit of a run 'cause I was writin' crap stuff up until then."

— to Billboard

"I met with Selena pretty early on, I think I was like 16…We were going to meet for coffee, but she was just like, 'just come over.' So I went over to her house and for a couple of hours and we ended up just barefoot on the floor of her kitchen. It was a while ago... but she was like, 'the most important thing is that you never deviate from your authenticity. You're just open, you're bare with your fans.' I have fully taken that in stride and I think that's a really universal thing that really holds up and I would give that advice to anyone."

— to PEOPLE

"I had a great role model in Sofia growing up, with her being a curvy woman that was super proud of who she was and what she looked like. She could see that I was struggling a little bit with how to deal with my body, and was always trying to give me advice, like, 'Here are some brands that would look good on our body type,' or 'Wear whatever you want, and feel good about yourself.'"

— to Self

"One of the first things she told me was, 'You're going to have to make a lot of decisions — make sure it's you that's making them.' And at that time, I was obviously very thankful for that and I nodded my head yes and we went on to our next conversation. It wasn't until I had to start making decisions that I realized how many people are involved and how important it is that my decisions are being made. And I always think back to when she told me that. I mean, she's made a few right decisions."

— to Vogue

"I was just on holiday for three days in Greece with my sister, and I thought that would make me happy and relaxed. But when I stop everything, it's really bad. I go crazy. In Greece, it was a lot of couples, and I felt alone, which made me sad. I called Rihanna. She said 'It's easy to drown yourself in work. That's a form of escapism. So, if you're alone and you want to cry, cry.' And I did."

— to W magazine

"Cate Blanchett is an amazing person. Very early on, I asked her about being a parent. I said 'How do you do it? You're a mom. You're the best at what you do.' She said, 'You just do. Stressing about it doesn't help.'"

— to Harper's Bazaar