Adele did it big for her dirty 30 & threw herself a Titanic themed birthday party.
She looked exactly like Rose in the film, just stunning!
As favors, she gave out life jackets and this is where it got a little weird for some people.
We obviously don't think she meant anything mean by it, but it was a true tragedy that killed 1,500 people.
As you can imagine, people were upset and took to Twitter.
Take a look below, what do you think!?
Some of her guests, obviously in costume were:
Mark Ronson even added to his costume fake ice.
And here are some of the comments: