Many fans slammed the look as "insensitive".
Supermodel Naomi Campbell, however, whose mother was born in Jamaica, commented on Adele's Instagram photo with two loveheart emojis and two pictures of the Jamaican flag.
British DJ Ace and singer Alexandra Burke also defended Adele.
"I love the picture, I don't care what people say. Big up to Adele breaking the internet. Big up to Adele. we love her. There's some other funny comments," said Ace.
"I see the pic. She looks hot. She's obviously been working on her body, that for me is a big deal. She's looking good," said Burke.
"As a Jamaican girl myself, my girl has grown up in black culture. People forget she's from Tottenham. She probably eats jerk chicken all the time like all of us."
Actress Zoe Saldana also commented, telling the singer "you look right at home guurrrl!".
David Lammy, Member of Parliament for Tottenham agreed, tweeting in response to a critical article: "Poppycock! This humbug totally misses the spirit of Notting Hill Carnival and the tradition of 'dress up' or 'masquerade'."
"Adele was born and raised in Tottenham she gets it more than most. Thank you Adele. Forget the Haters."
Many fans also defended the singer, with one writing: "To all the ignorant non-Jamaicans dragging Adele for supporting the Jamaican culture, sit down! You don't speak for us!
"We are proud of Adele! Nuff respeck to her!"
The star was born in Tottenham before moving with her mother Penny Adkins to Brighton at the age of nine.
In 1999, at the age of 11, she and her mother moved back to London; first to Brixton, then to the neighbouring district of West Norwood in south London, which is the subject of her first song Hometown Glory.
