With the conclusion and disappearance of How I Met Your Mother, CBS not only no longer has a Monday night leadoff anchor, it has a Monday lineup that suddenly looks suspiciously weak. Tonight, CBS moves 2 Broke Girls into the leadoff spot – a show that doesn’t deserve it -- but on this first outing as the opening batter, 2 Broke Girls has a ringer. Its guest star, playing a scatterbrained bridezilla, is publicity magnet Lindsay Lohan.