Orlando Bloom, Jessica Alba, Kate Hudson and More Attend Katy Perry’s Sock Hop-Themed Halloween Birthday Party

Katy Perry and Orlando Bloom Win the Prize at Kate Hudson's Annual Halloween Bash
Katy Perry transfored herself into Democratic presidential candidate Hillary Clinton.

After Katy Perry pulled out an epic Hillary Clinton costume, you’d think that she didn’t have any other tricks up her sleeve, and you would have thought wrong.

Just a day after taking home the prize at Kate Hudson’s Halloween party, Perry threw a Halloween/Birthday bash of her own: a sock hop party inspired by Grease. Perry deemed herself Principal of Hudson High, but that didn’t stop her from hooking up with the school’s resident jock, aka Orlando Bloom.

Tons of celebrities, including Jessica Alba, Jessica Chastain, Cara Delevingne, Ellen Page, Suki Waterhouse, came out for festivities and shared pictures of what looked like a rocking party.

Big pinkin’

A photo posted by Cara Delevingne (@caradelevingne) on

Happy birthday Hudson! 🎂 #SockHop

A photo posted by Kate Hudson (@katehudson) on

#aboutlastnight #HudsonHigh #detention -had a blast celebrating miss @katyperry

A photo posted by Jessica Alba (@jessicaalba) on

Launch the gallery up top to see more photos from the party.