"If there's any question at all, the belief is that Gaga and her most recent lovers will demand a DNA test!" the source outrageously added.
Lady Gaga was engaged to Christian Carino, but after rumours surfaced that she was having an affair with co-star Bradley Cooper, sources says that the girlfriend of the actor, Irina Shayak, could be displeased with Gaga's pregnancy news.
"If Gaga is pregnant, that could throw a wrench into things, whether it's Bradley's baby or not, given how close he and Gaga are and how much she leans on him for support," the insider spills.
"Gaga is a strong woman and she especially confident she could be a mother at this moment," they added.
Lady Gaga's rep flatly denied any romance between the pair or pregnancy news and claims made by Star.