Katy Perry: Night Out with Mother-In-Law Barbara!

Katy Perry and her mother-in-law Barbara enjoy a night out on the town together on Monday (October 17) in London, England.

First, the 26-year-old singer and her hubby Russell Brand‘s mom went to the West End to see the musical adaptation of Ghost.

Then the duo headed over to Nobu Restaurant for an after theatre dinner.

Katy loved the show!

“Last night we all went & saw GHOST (musical) in LDN. Cried our eyes out, it was SO good! Congrats to my friends Glen Ballard & Dave Stewart!” she tweeted. Glen and Dave wrote the musical adaptation.

FYI: Katy is wearing a Giambattista Valli dress and coat.

10+ pictures inside of Katy Perry and Barbara out on the town…