With T-three hours to go until the Red Carpet commences for the Costume Institute Gala, we're beginning to see signs of action at the Metropolitan Museum of Art. Namely, a huge inflatable balloon. Cause nothing says "American Woman" like hot air? Anyway, it's been confirmed that Lady Gaga is performing tonight...-

[Picture via]

Rumor has it she'll be wearing Prada.

Other confirmed guests include Kristen Stewart, Emma Watson, Diane Kruger (in Calvin Klein), Eddie Redmayne, Melania Trump (in Christian Siriano), Kirsten Dunst (in Rodarte for GAP), Zoe Kravitz (Alexander Wang for Gap), Kerry Washington and Riley Keough (in Thakoon for Gap), Jessica Alba, Vera Farmiga, Taylor Swift (in Ralph Lauren), Emmy Rossum and Matthew Morrison, both in Kenneth Cole, Brooke Shields, Chanel Iman, and Diane Lane in Michael Kors, and Sarah Jessica Parker, who will narrate the exhibit.

[Source]