I want Bey to wear a modified version of this gown from Ricardo Tisci's first couture collection at Givenchy, with her Glastonbury hair.
If Rihanna does attend, I want her in this Tom Ford look with her new, flawless blonde hair.
If Lady Gaga does attend, I want her in this full Masion Martin Margiela look.
And Katy needs to wear this Madonna homage dress by Gaultier (of course) with a chignon or slicked back ponytail.