First of all, I'm not hating on Gaga, I like her, just found this interesting and wanted to see what fans have to say because I honestly don't quite believe it.
Second: Sorry if it is AP!
I was going in Facebook and I saw a link to PopLine, a brazilian website, where they say Lady Gaga called an australian radio station to compliment her own show saying "it was the best show she was ever in".
The website claims her north american accent was explicit and she named herself Stefani, there's even the audio:
Don't know if it's true but it's quite funny though, if it's her she sounds a lil drunk, not blaming her!