Gaga doesn't talk like that, the impression wasn't very good She should've made her voice deeper and overpronounciated the words cause that's how Gaga talks lately.
It would have been more funny if they had chosen to base it around someone who is more topical and currently in the forefront of the pop culture zeitgeist.. missed opportunity
It’s funny that Bayer is spoofing Gaga now, when she’s less crucial to the zeitgeist, and used to spoof Miley Cyrus, who is probably the most-discussed celebrity of the last few months.