© Getty Images

Kylie Jenner - She's the CEO of her own cosmetics line, she recently became a mother, and the youngest Jenner is still only 20 years old!

© Getty Images

Jim Parsons - The 'Big Bang Theory' star is actually 45 years old.

© Getty Images

Halle Berry - She's going to be 52 this year. Let that sink in.

© Getty Images

Madonna - The Material Girl will be the big 60 this year, making everyone feel a little old.

© Getty Images

Stacey Dash - She looks like she just walked off the set for 'Clueless'—playing a high school student at the age of 28—but now she's, somehow, 51.

© Getty Images

Gabriel Mann - The actor is 46, though he could still probably play a college student. 

© Getty Images

Alexis Bledel - Looking like the young, naive Rory that 'Gilmore Girl' fans remember, Bledel is somehow turning 37 this year. 

© Getty Images

Kate Upton - The model has been praised for her gorgeous and timeless beauty, but little do most people know, she's only 26!

© Getty Images

Sandra Bullock - 'Miss Congeniality,' through some strange magic, is turning 54 this year.

© Getty Images

Gabrielle Union - She was 27 when 'Bring It On' came out and she played a high school student, and this year she'll be 46, looking the exact same. 

© Getty Images

Sarah Hyland - The 'Modern Family' star has an incredibly deceiving baby face, and she most definitely doesn't look like she's turning 28 this year. It's a late blooming blessing, she'll see. 

© Getty Images

Jared Leto - Maybe it's all the hair or his soft and wrinkle-free skin, but this star does not look like someone who's going to be 47 this year.

© Getty Images

Lindsay Lohan - She started out very young and has been in the tabloids for years, many times in relation to trials and visits to rehab centers, so it's surprising to find out that she's only 32.

© Getty Images

Sarah Silverman - The gut-busting standup comic is both sexy and savage onstage, making it hard to believe that she's 47. 

© Getty Images

Anna Kendrick - She still looks like that college student who reluctantly joins an a cappella group, but she's actually going to be 33. 

© Getty Images

Selena Gomez - The pop star got her start on television in Disney's 'The Wizards of Waverly Place' when she was just 15, but now she's 26!

© Getty Images

Jane Fonda - Bow down to the hottest 80-year-old on the planet. 

© Getty Images

Angela Bassett - This face and body have roamed the earth for 60 whole years!

© Getty Images

Jennifer Lawrence - She has cemented herself in Hollywood history and been the highest-paid actor in both 2015 and 2016—all before she turned 27.

© Getty Images

Tom Cruise - The actor has only seemed to increase the crazy stunts he does in films, ripening still at the age of 56.

© Getty Images

Bella Hadid - She's often confused as the older one when it comes to her and her sister Gigi, but despite her mature looks, she's really just 21 years old.

© Getty Images

Cher - Everyone wishes they could rock sheer jumpsuits and huge hair at 72, but only Cher can. 

© Getty Images

Kris Jenner - The 'momager' who seems to never age, even as her children get married and have children of their own, is going to be 63 this year.

© Getty Images

Gwen Stefani - She's turning 49 this year, and she is hands down the hottest mother of three that music has ever seen. 

© Getty Images

Jaden Smith - He made his film debut with his father in 2006's 'The Pursuit of Happyness,' and since then he's been a musician, a model, a fashion designer, and a huge cultural influence, all before the age of 20.

© Getty Images

Samuel L. Jackson - Though he looks like he could step right back into 'Pulp Fiction' with the help of a little 'fro, the legendary actor turns 70 this year. 

© Getty Images

Elle Fanning - She's been acting for more than 16 years, and though she has a young face and is commonly known as Dakota Fanning's younger sister, she's actually 20 years old.

© Getty Images

Jennifer Lopez - J-Lo has been putting out hit after hit for years, somehow making people forget that she's a mortal who must also age. She'll be 49 this year!

© Getty Images

Lucy Liu - This 'Charlie's Angel' turns 50 this year, though close examination would seem to say otherwise.

© Getty Images

Keanu Reeves - Sure, he's grown from his Bill and Ted days, but he certainly doesn't look like he's going to be 54 this year.

© Getty Images

Christie Brinkley - The 64-year-old former supermodel looks like she could hop right back onto that catwalk. 

© Getty Images

Bella Thorne - Spotted canoodling with 35-year-old Scott Disick and 31-year-old rapper Mod Sun, it's easy to forget that she's only 20. 

© Getty Images

Carly Rae Jepsen - The 'Call Me Maybe' singer is going to be 33 this year, and it's likely she's now interested in more stable relationships.

© Getty Images

Jennifer Aniston - People can't stop asking her what her secret is to looking so young at age 49. 

© Getty Images

Taye Diggs - This 47-year-old actor looks like he's still in the experimental wardrobe phase that happens in your 20s.

© Getty Images

Martha Stewart - She never stops surprising us, especially when it comes to the fact that she's going to be 77 this year.

© Getty Images

Sharon Stone - The actor raises the bar for what we hope to look like at 60.

© Getty Images

Pharrell Williams - Young stars can only hope that they're still making music and headlines like Pharrell at age 45. 

© Getty Images

Michelle Pfeiffer - The actor is 60. She just gets better with age apparently.

© Getty Images