In 2011, Cher altered the course of history when she asked a random Twitter user if she can say "fk u" on Twitter.
The answer is clear: YES. Of course she can, because Cher can do whatever she wants. But in reality, Cher didn't even need an answer, because even if someone said no, she's been tweeting every hater "fk u" in various creative ways since the question was asked.