So many awesome people in one place! It's like the Met Gala all over again!
The 26-year-old served up Old Hollywood glam in an embroidered black and white Lena Hoschek gown with scalloped sweetheart neckline.
She's also set to perform her song Young and Beautiful from the film's soundtrack tonight!
What a coincidence! The song title accurately describes her look as well!
[Image via Getty Images.]