"I am so sorry to anyone who had their heart set on seeing me tonight", she wrote.
"If she wants to meet us in Prince Edward Island, that'd be great", said Lisa Halliwell, who travelled from the East Coast to see the show.
Lady Gaga is quite generous with her fans.
Despite his cuddles, the rain caught up with Gaga who explained her previous gig at Citi Field in NY left her "sick".
Lady Gaga announced on Monday that she was cancelling her concert in Montreal due to laryngitis and a respiratory infection.
The tour continues on September 6th and 7th, in Toronto, her final dates in Canada, before two shows in Philadelphia, and then a night in Rio de Janeiro, Brazil.
"The Cure" singer added that she was "so sorry" to any fans, whom she affectionately calls Little Monsters, who were disappointed they wouldn't be able to catch her set.
What do you think about Gaga's pizza party for fans?
As well as pizza, the Joanne singer sent her fans autographs as a thank you for their support.
When Gaga says he was "making sure I was okay", she's talking about the fact that she felt sick during the performance.
Fans are instructed to hold onto their existing tickets, as promoters are now working to reschedule the Montreal performance for a later date.