Dwayne Johnson
The Rock sported a Christmas sweater-themed onesie on Live With Kelly and Michael and channeled Elvis Presley with a performance of "Here Comes Santa Clause," in an episode that aired on Christmas Eve 2014. Watch it here!
Kourtney Kardashian
Kourt covers her baby bump in a warm onesie.
Rihanna
Now THAT's what you wear on a flight!
Kris Jenner
The E! star celebrates her 59th birthday at Disneyland in comfort!
Katy Perry
Yum! The singer makes a tasty fashion statement in a pizza-patterned jumpsuit.
Jesse McCartney
Comfort was key for the "Beautiful Soul" singer who stepped out in a blue, hooded onesie and a pair of man-Uggs.
Mel B
The X Factor judge stays warm in a fuzzy onesie with cute animal ears.
Rihanna
Always the fashionista, RiRi modeled a River Island camouflage jumpsuit as she caught a flight in NYC.
Justin Bieber & Lil Za
The pop star and his pal donned matching onesies in Sweden.
Rita Ora
The Brit beauty keeps it colorful in a floral onesie and chic sunglasses.
Cara Delavingne
Someone's hungry! The supermodel wears the same pizza onesie that Katy Perry wore!
Rumer Willis
The actress keeps cozy in a skeleton onesie and a knit beanie on set.
Julia Roberts
The Pretty Woman star is the definition of comfort in her denim jumpsuit.
Avril Lavigne
The pop-rocker flashes some cleavage underneath her camouflage jumpsuit while signing autographs.
Bella Thorne
How cute! The Shake It Up! actress dresses as Minnie Mouse in a polkadot onesie.
Pink
The "Just Give Me a Reason" crooner seems cool and relaxed in her red and black onesie as she boards a flight with her family.
Mel B
Scary Spice shows off her star-spangled onesie in London.