Who's not invited to Katy Perry's Wedding

The cast of American Idol (Luke Bryan, Katy Perry and Lionel Ritchie) featured on Jimmy Kimmel's chat show.

They discussed the series and how Lionel Ritchie doesn't take risks. 

The judges also discussed how they are not invited to Katy and Orlando Bloom's wedding. 

If these two don't make the guest list, which of her other celebrity friends do you think will not be on the seating chart?