Watch! Ellen DeGeneres Dances on 'SYTYCD'!

Talk show host and dance superstar Ellen DeGeneres surprised viewers everywhere with an unannounced appearance on Thursday's finale of "So You Think You Can Dance."

Ellen, who loves to bust a move daily on her own show, agreed to dance alongside tWitch in place of Alex Wong, who left the competition early due to a ruptured Achilles tendon.

Check out Ellen's impressive dancing!

After her performance, DeGeneres told a cheering audience, "It doesn't matter if you have ever had a dance class in your life, which I haven't, maybe you couldn't tell. But everybody should do this, it is so much fun."