Mariah Carey performed in Sao Paulo, Brazil over the weekend and the appearance has left some folks speculating that the R&B diva and hubby Nick Cannon might be expecting their first child together.

Billboard posted a clip of Carey performing 'We Belong Together' -- the Brazilian audience does some impressive singing along -- and noted that Carey looked "visibly larger and rounder in the belly."

While there is no confirmation of pregnancy, Carey, who has been plagued by pregnancy rumors in the past, sent up a suspicious tweet after the show. "Seriously, I really do love it here, beautiful people inside and out! Tonite was tuff 4 me 4 personal reasons, but U got me thru!L4L."

Judge for yourself. You can watch Carey performing 'I Want to Know What Love Is' at the same concert here.