Justin Timberlake was more engaged watching the Spain-Germany World Cup match Wednesday than working on his new flick, “Friends With Benefits.” The star was at Midtown eatery Hudson Hall reading lines with the movie crew, including co-star Mila Kunis. But Timberlake was distracted by the game being broadcast on the flat screens throughout the restaurant. “Timberlake was standing there watching the game, not wanting to leave,” said a witness.