By Leah Ornstein - Breaking Celebrity News Features Editor

Hollywood’s hottest stars got all glammed up and hit the Metropolitan Opera Gala Premiere of Jules Massenet’s "Manon" on Monday night, but not everyone was dressed to thrill! Breaking Celebrity News has photos and details about all the stars and what they wore to the star-studded event. 

Yves Saint Laurent was the main sponsor of the evening, so it isn't surprising that several stars donned gowns from the designer collection.

Amber Heard scored the best look of the night, showing off her bombshell body in a slinky, body-skimming and back-baring gown, while Emma Roberts also scored points for her sweetheart strapless jumpsuit belted in red. 

Hugo star Chloe Moretz looked elegant in a dark blue tiered strapless gown, while January Jones looked like a matronly housewife from the 1950s in a body-drenching, sleeved style that featured a side slit.