The newly re-joined and re-energized supergroup Fleetwood Mac is scheduled to tape a live concert for MTV in Los Angeles May 22-23 for broadcast later this year. (The band members, including the blond gypsy queen herself, Stevie Nicks, all seem much happier now that they've ended a long period of going their solo ways.) Warner Records will release the CD of this event and has high hopes that the new disc might even equal the legendary "Rumours".