It's not just EU ownership, the relevant treaties all refer to substantial ownership and effective control.
If they want to play hardball I can see some MSs objecting to an Irish, or other, designation of U2 as a community air carrier.
Look at what Virgin America had to do to prove they were American, and you'll have an idea what games can be played with this very simple sentence. McCall will not be a EU citizen, on the day. Perhaps she can be Irish ...