#Unfiltered week of 4/1 : Carrie Underwood shares post-workout makeup-free selfie

Carrie Underwood got her sweat on over the weekend in a makeup-free post-workout selfie.

"When your face matches your shirt = you had a good workout! Unless your shirt is blue...then maybe you should be concerned!" the country superstar joked in the caption.

Reese Witherspoon, Jenna Dewan, Ashley Graham and more celebs also took to Instagram to share their best fresh-faced selfies, while Amy Schumer showed off her baby bump in a True&Co. bra feeling "strong and beautiful"

Jimmy Fallon got nostalgic on his younger years with an adorable throw back pic and Lebron James fanned out over Billie Jean King after the 39 Grand Slam tennis pro attended the Lakers game.

From Kylie Jenner's stunning vacation look to J.Lo and A.Rod's family baseball outing, scroll through the gallery above for the best celebrity Instagrams on the week!