A video of the 28-year-old was posted to a fan’s Twitter account on Monday 21 November where she was filmed saying goodbye to fans in Phoenix.
“I’ll see you later, I’ll see you on the other side,” she can be heard saying to the crowds.
“I’m going to have another baby.”
The singer, who is already mum to four-year-old Angelo with her partner Simon Konecki, sent fans into overdrive on Twitter guessing whether she was pregnant or just planning on having another child.
Adele previously revealed she was “scared” to have another baby because she suffered from postnatal depression.
Speaking to Vanity Fair in October 2016, she said: “I had really bad postpartum depression after I had my son and it frightened me.
“I was very reluctant [to talk]. My boyfriend said I should talk to other women who were pregnant, and I said: ‘Fuck that, I ain’t hanging around with a fuckin’ bunch of mothers’.”