In the 'Flip or Flop' series finale, it was revealed that Christina Haack was behind the decision to end the HGTV show. ET's exclusive sneak peek at 'Tarek and Heather: The Big I Do' on HGTV ...

Find out why Christina is moving on. Going down with a flight. On the very last episode of Flip or Flop, Christina Haack and Tarek El Moussa can't seem to agree on what to do with a rundown pool.