Jessica Simpson just had an ex's worst nightmare situation! While on a flight to Hawaii for a tropical getaway, the fashion designer's trip was ruined by finding out her ex Nick Lachey was on board the same flight. Not only that, he was ALSO in first class. There was no avoiding him completely! Oh no! Per an insider for TMZ, despite the fact they were just feet away from each other the whole flight from El Lay to Kauai, they tried their hardest to ignore one another.