Celebrities are typically dressed to the nines and look flawless while stepping out on a red carpet. But in their down time, stars are just like us. They don't always pack on the makeup when running errands around town.

While pictures of celebs without makeup are often the stealthy handiwork of a paparazzo, lately, many A-listers like Rihanna, Miley Cyrus and Mariah Carey are taking to Twitter to post their own fresh-faced pics.

Here, EnStars rounded up the top photos of celebs who we think look fab without a stitch of makeup.

PHOTOS: Stars Without Makeup

On Saturday, Jennifer Aniston's friend and hairstylist Chris McMillian posted a photo of himself and the We're the Millers actress on Instagram yesterday with the caption: "Best #friends #no makeup #girl-time."

Aniston was bare-faced, with no make-up and looked amazing while in New York City.

In April, singer Demi Lovato posted a series of makeup-free photos on Twitter. The X Factor judge posted photo collage of her enjoying her weekend, makeup-free and looking absolutely gorgeous.

She tweeted, “Ladies, be brave today.. take off your make-up and stop using those filters!! WE are beautiful!!!”

In June, the usually ultra-glam Mariah Carey posted a photo, in which she was makeup free. After celebrating her 43rd birthday, Mariah skipped the makeup and showed off her seriously amazing skin in a photo she posted to Instagram.

The former American Idol judge and mother of two is practically glowing as she hugs a stuffed toy lamb in the photo: “Love to all the lambily!!! #WWLD."

See More Celebrities Without Makeup: PHOTOS