No, it wasn't the Oscars, but the huge bash for the Academy's brand new Museum of Motion Pictures came pretty close. From the star-studded guest list to the high-glam red (well, green) carpet ensembles, the museum's glittering opening gala on Saturday was a major Hollywood night out. Lady Gaga, who performed at the event, went all out in Schiaparelli while Laverne Cox channeled her inner Marilyn Monroe. And that's just the half of it. Click through for all the must-see celebrity looks of the evening!

[Photo via Getty]