Paul Trynka's Bowie biography Starman opens by describing this performance on Top of The Pops:
The fifteen-million-strong audience struggles to absorb this exotic, pansexual creature; in countless households, the kids are entranced in their thousands as parents sneer, shout, or walk out of the room...for scattered isolated kids around the UK, and soon on the American East Coast, and then on the West Coast, this was their day. The day of the outsider.
Trynka also notes the chorus of Starman borrows more than a few notes from "Somewhere Over the Rainbow".
All to say I've started reading Starman. I'll let you know whether it's worth a go ( at 500 pages no less!) every so often.