Video: Shia Labeouf, Adrien Grenier and Isabel Lucas involved in a love triangle???

Update: yes indeed........
People:
Adrian Grenier and his girlfriend, Transformers 2 star Isabel Lucas, have split on the heels of her car crash while driving with costar Shia LaBeouf, a source tells PEOPLE. The pair broke up about three weeks ago, right after the accident that left LaBeouf with a crushed hand. "It wasn't working out," says a source. "Adrian saw her with Shia and that was kind of it – the crash, their hanging out. He obviously didn't appreciate it."