Lady Gaga was forced to cancel shows in Seattle and Vancouver because of illness Credit: Christopher Polk/Getty Images

Mother Monster is a little under the weather. Lady Gaga had to cancel multiple shows this week after she came down with a bad case of bronchitis, she announced via Twitter on Wednesday, May 28.

"I'm devastated I'm unable to perform this week. Ursula took my mermaid voice, I've come down with horrible bronchitis," she tweeted, alongside a picture of Disney's famed sea witch villainess, who gave Ariel legs in exchange for her voice in The Little Mermaid.

She then added: "My deepest apologies to Seattle and Vancouver, we'll reschedule those shows & be back to make it up to you. I [heart] monsters. #sadgaga"

The Grammy-winning star, 28, was set to take the stage in Seattle, Wash., on Wednesday, and in Vancouver, British Columbia, on Friday. The shows are part of her ArtRave: The Artpop Ball tour, which kicked off earlier this month in Fort Lauderdale, Fla.