As so many of our most iconic stars of yesteryear age, they do a lot of cosmetic procedures and injections to stay youthful. Some are more obvious than others - and some stars don't need it at all. While I am certain that nearly all of these actresses are getting some Botox, they are doing everything else as subtly as possible to make us forget about how old they are. They prove that ageism is stupid because being in 40s and 50s is sexy.

Here are some celebrities whose ages will surprise you.

Jennifer Lopez

The 54-year-old music icon looks like she is about fifteen or more years younger than she is. I don't know what her skin and workout regimen in, but it is working wonders. She looks so fit that I am starting to think that she is doing some Brujeria behind the scenes. There's no way that being Mrs. Ben Affleck is what's making her look so refreshed. But maybe I'm wrong and that's J. Lo's secret.

She's How Old?! Sexy Celebrities Who Look Younger Than They Are

Salma Hayek

Salma has been one of the sexiest women in Hollywood since the 90s - and she still holds that title. Seriously. The 57-year-old Mexican mamacita keeps us as horny as we were for her when she was in her early 30s. You might not even realize that she didn't break through as a star to American audiences until she was in her mid-30s. So she has always kept us guessing when it comes to her age. But who cares? Salma is proof that MILFs are muy caliente.

She's How Old?! Sexy Celebrities Who Look Younger Than They Are

Gabrielle Union

I bet you can't guess how old Gabrielle Union is. The bright-eyed actress has been everyone's crush for decades now which means that she must be older than 32 - even though she doesn't look it. Well, she is 51-years-old. What is her secret? They say that black don't crack, but I also suspect that having a husband who is nine years younger than you helps keep you young.

She's How Old?! Sexy Celebrities Who Look Younger Than They Are

Isabelle Huppert

Here is a shocking one! First of all, French actresses don't age. Juliette Binoche is 59, Audrey Tatou is 47, and I could go on. Isabelle Huppert remains a powerful actress who has never slowed down. I think that that keeps her young because this beauty is 70.

She's How Old?! Sexy Celebrities Who Look Younger Than They Are

She's 70! That means she went nude in Elle in her 60s. She didn't look a day over 50 to me - she barely even looked that old!

She's How Old?! Sexy Celebrities Who Look Younger Than They Are

Jamie Chung

Here's another surprising one: Jamie Chung. She is not as old as some of the other queens on this list, but she looks like she is in her late 20s. She is actually 40. She began her career in reality TV as a Real World cast member and she remains a young reality TV face to many fans. However, she is middle-aged and going nude!

She's How Old?! Sexy Celebrities Who Look Younger Than They Are

Jennifer Aniston

Finally, the Friends stars are aging, but not all of them are aging like Jennifer Aniston who does not seem to be aging at all. The Morning Show starlet turns 55 next week (February 11 - make sure you send her a card). That hardly seems possible. Isn't she 38???

She's How Old?! Sexy Celebrities Who Look Younger Than They Are

She's How Old?! Sexy Celebrities Who Look Younger Than They Are

Reese Witherspoon

Jen An's Morning Show c-star still looks like she's is in her thirties, but the blonde babe is 47 years old - 48 in March! She still has a youthful energy and unlike other actresses her age, she can still emote and move her face. She's gorgeous and she gets better with age! She did these hot scenes only ten years ago: