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Blake Lively - "I’d encourage myself to love myself and fight for myself, as hard as I fought for other people," the actress told People.

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Jennifer Lawrence - "Make sure you know how much everyone else is getting paid," would be J-Law’s advice, which she shared soon after the Sony Pictures hack revealed a huge pay gap disparity between her and her male co-stars.

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Michelle Obama - The former First Lady wrote a letter to her younger self for People, which said, "If I could give my younger self just one piece of advice, it would be this: Stop being so afraid!”

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Jennifer Lopez - "I’d tell myself to love myself because when we love ourselves we make good choices," J-Lo told MindFood. "When we don’t, we are not focused and we make bad choices. I learned that lesson the hard way.”

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Rihanna - The singer had the most relatable advice to her younger self: "Sleep," she told E! News. "Because you're not gonna get to do it in your twenties or your thirties."

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Britney Spears - "Never get married is number one, that's probably the best advice I could give myself," Spears joked during an interview.

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Samuel L. Jackson - “Be patient,” are the two words Jackson would offer his younger self. He would eventually become the coolest man alive... 

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Jada Pinkett Smith - "I wish I had known then that pain is just a part of your journey and it’s not because you’ve done something wrong or because you’re cursed or you’re a bad person, we’re all going through it," the star revealed to ET. 

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Olivia Colman - "You won't remember the good things people say, but you must forget the bad things," would be Colman's advice to her younger self, she told the BBC. "And don’t get cocky about hangovers, you definitely will get them one day!"

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Reese Witherspoon - Reese told MindFood she'd tell her younger self that "no one is coming to save you and you will have to save yourself. And also that no relationship, no child, mother or father are going to fix your problems."

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Oprah Winfrey - When asked what her advice for her younger self would be, she said: "Oh, baby girl, what the world has in store for you. First of all it would be 'relax,' it would be, 'stop being afraid,' and it would be, 'everything is going to be alright. No matter what it will all be OK.’"

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Lady Gaga - When asked what she would tell her younger self, Gaga said, “Nothing. If I had known anything, this never would’ve happened. It was my delusion and naïveté that brought me here.”

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Joe Jonas - The singer would tell his younger self: "Don’t over-analyze things, just have fun and enjoy every minute as it comes. When you’re young, it’s easy to worry too much about what people think of you."

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Keira Knightley - "Don’t worry about making mistakes and have fun," would be the actress' advice.  

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Hailee Steinfeld - "Listen to yourself. So many people will try and steer you in a certain direction… but you have to know what’s right for you. Trust yourself, follow your heart, and do what makes you happy," the star would tell her younger self.

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Melissa McCarthy - "If I could go back in time and tell my 10-year-old self anything, I would tell her: Don’t worry about what other people think, or about whether you’re doing what they think is the right thing. The things you worry about now, they mostly won’t matter. So just follow your heart," the actress shared with People.

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Judi Dench - The actress would tell her younger self not to wear things that other people said she looked good in. "Wear what you feel good in; it will look much chicer than wearing something fashionable that makes you feel ill-at-ease."

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Emma Stone - The actress would tell her younger self, "Stop with the self-tanner! It’s enough."

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Demi Lovato - "I would say, you’re beautiful the way that you are, and to not focus on anything but your mental and physical health, before work. Put it before everything," she said during an InStyle interview. 

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Antoni Porowski - In a video about mental health, the 'Queer Eye' star said to his past self: "Seek out help no matter who it is, whether it's your parent, a social worker, a friend, family member, teacher, whoever it is."

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Emilia Clarke - To her younger self, the actress told Teen Vogue, she would say, "You are not as fat as you think you are." And she would assure herself that heartbreak would come, but that even when she felt she wasn't worth it, she was. Plus, of course, “Winter is coming.”

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Khloé Kardashian - On her app, she said she’d tell her younger self to "only do something you’re comfortable with,” in regards to dating. "Be secure with your decision: Sometimes we just do things to do them. I think it takes away from the specialness of who we are."

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Kesha - The singer wrote a moving letter to her younger self for People, which said, "Don’t let people scare and shame you into changing the things about yourself that make you unique and interesting. Those are the qualities that will make your life so magical."

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Gabrielle Union - "One day you’ll appreciate how much your brown skin shines in the moonlight, glistens in the sun and ages ever so slowly," Union said in an interview with Ebony magazine. "Don’t let that pesky low self-esteem creep in and fool you into believing that you don’t have value."

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Tracee Ellis Ross - In an interview with Teen Vogue, she warned her younger self: "There will be parts of your body that you are not fond of. That’s OK. You can love those parts of you even if you don’t like them. And you do that by being kind to them. And speaking gently and lovingly to those parts of yourself."

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Gus Kenworthy - "I would tell myself that—as hard as I'm going to try to be what everyone expects me to be or what I thought everyone expects me to be—in the end, it's not going to make me happy," the Olympic skier told Upworthy.

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Elisabeth Moss - "I would tell myself not to stress about the outcome of things," the actor told the BBC. "For me, I think there’s a sense of every mistake you make leads to kind of learning something and becoming stronger."

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Alison Brie - "I probably would be like 'You’re beautiful! Enjoy your body!' I remember in my twenties just always being so unhappy with my body. My body was beautiful!” the actress told People.

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Natasha Lyonne - If the 'Russian Doll' actress could talk to her younger self, she would say "that everyone is a little bit broken, and that's their underlying beauty. So that's OK."

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Shay Mitchell - "I would say, 'Don’t try and be anything that you’re not,'" the actress told InStyle.

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Laverne Cox -

In a beautiful essay to her younger self, the actress wrote, "I want you to know you are beautiful and that you are not what all those people who don’t understand you say about you."

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Kelly Ripa - "I would still tell myself to talk less, but I tell myself that everyday, and I don’t listen," the TV personality said.

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Vanessa Williams - The actress and singer would tell her younger self: “You don’t have to try so hard.”

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Adwoa Aboah - "I would never want to change anything, because all these things have led me to this place," said the model and Gurls Talk founder. Instead, she would reassure her younger self that "there is light at the end of the tunnel."

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Queen Latifah -

"If I could have talked to my 19- or 20-year-old self, I would have said, 'You’re going to be fine. It ain’t that serious!'"

See also: Pen pals go public: Infamous celebrity open letters.

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