season 21 live shows are here and it's time for fans to vote!Following the Top 11 performances on Monday night, Tuesday's live show will feature the announcement of the Top 10 -- the performers who earned the most votes this week, as well as the winner of yet another Instant Save, a five minute, fan-voted competition between the remaining performers for a chance to stay in the competition.During Tuesday's show, when host Carson Daly makes the announcement that Instant Save voting is open, fans