Katy Perry Called Mom Mary on Mother's Day During Concert!

Katy Perry bares her midriff while grabbing a bite to eat at Wolseley Restaurant on Monday (May 12) in London, England.

“Nottingham! Thanks for helping me wish my mom a happy Mother’s Day over my speaker phone on stage tonight! I bet she won’t forget that one 😍,” the 29-year-old singer tweeted the day before.

PHOTOS: Check out the latest pics of Katy Perry

Earlier in the week, Katy showed off her amazing costumes while kicking off her Prismatic World Tour in Northern Ireland.

In case you didn’t know, Katy is scheduled to perform next in Birmingham, UK on Tuesday, May 13.

FYI: Katy is wearing an RVN top and skirt.