returns Monday night for the third week of Season 30! With a slew of excited celebs ready to dance their hearts out, ET is following along throughout the two-hour spectacular to break down all the best dances and the most surprising moments from the hotly anticipated Britney Night!As the contestants duke it out on the dance floor, judges Carrie Ann Inaba, Len Goodman, Bruno Tonioli and Derek Hough will give feedback and dole out their scores — all before another pair gets the boot.There's a lot