No. Two is more than enough, a commercial pop star needs to stand on their own two feet as Gaga said and I agree. As a Gaga fan I don't want her doing a lot of collaborations with other commercial pop stars.
The Telephone music video was fantastic, but I think another collab would be overkill. I don't really want Gaga to collaborate with different artists for a while, but if she does, I would hope she doesn't repeat a previous collaboration.