It looks like Lindsay Lohan is doing what she does best on the set of Glee - being unpredictable. TMZ picked up on the trouble on the set when Dot-Marie Jones, who plays Coach Beiste on the show, tweeted, "Gonna be a long day!! Some ppl show up late and just throw a wrench in things. Not cool! I'd rather be an hour early (I was) than 5 minutes late!" Sources on set confirmed that the actor who was tardy to the party was none other than Lohan, who apparently had no trouble making it to a late-night party the night before. Lohan is doing a guest spot on the show, and the director of the episode, Eric Stoltz, said despite the late arrival, Lohan has done a great job, nailing her lines and playing nice with everyone on set. TMZ reports that Thursday's tardiness didn't affect the production schedule.