She won't be going into "space but rather the outer shell of the atmosphere - the point before space. That's what the Virgin atlantic plane is planned to do :)
To tell the truth I don't think that people are much interrested in hearing someone singing live in space, people are interrested in hearing a fantastic new single, something like "Poker Face" or "Bad Romance" or "Born This Way" here on a normal stage or on tv on Earth.
I don’t think she’ll do it, honestly. Gaga promises a lot of things and announces and makes too many statements and then either cancels/forgets them or contradicts herself. I’ll believe it when I see it, that’s all I can say.
That's an agreement with Virgin Co. So I'm sure she is still obligated by the contract with them, and she has always worked closely with them in the past so I am certain that is still going to happen. It is also in sync with a huge event happening simultaneously on earth as the ship goes up which wouldn't be something GaGa would want to back out of.