According to BBC Radio 1, Jamiroquai are no longer part of the Live 8 concert lineup for Paris on 2 July.  The Radio 1 website wrote on 15 June...

"We've also been told that Jamiroquai have pulled out of playing the Live 8 gig in Paris. They're playing in London the following day and reckon it just isn't possible to do both."

In another quote (from ContactMusic.com), Jay says:

"I don't know anything about playing Live 8 and nor does anyone at my record label.  Apparently it's been announced that we will be playing in Paris, but it's news to us and certainly no one's asked me to appear."