Chelsea Handler shares photo with her breast hanging out of her shirt (+18)

USA - American comedian, Chelsea Handler shared a number of photos to wish her sister a happy 50th birthday but one of her photos has caught attention.
In the photo, Chelsea, 44, has one of her naked breast hanging out of her shirt. She had no nipple pasties to hide her nipples.
Followers noticed the photo and commented on it, wondering if it was a mistake or intentional.
See the photo (which we censored) and comments below.