A "brain freeze" can happen to anyone and even celebrities are prone to it - accidentally dropping the ball in the middle of their most popular song with millions of viewers watching and critiquing. Even though musicians practice to perfect their performance, sometimes stuff happens. Even just missing one word during a concert can send an otherwise seasoned artist off the edge muttering to themselves, "How could I mess up my own song?" The best performers are the ones that pick themselves up and dust themselves off and exhibit the ability to laugh at themselves.

Check out the forgotten lyrics and flubs made by celebrities like Amy Winehouse, Elvis Presley and more after the jump!