Oh, I thought she was the girl in that black leather suit...
Hehe. Apologies, Cuthbert. That's Suzi Quatro during her early 70's finery (as created by Ken!). She was a bit of Glam Rock star in her time before going on to star in Happy Days. If you check YouTube, you'll find some very cool footage. Another famous, in the UK, bit of footage featuring Ken's work is a performance of Maggie May by The Faces on Top of the Pops - they're wearing mismatched suits. Ken said that he gave them the suits and they all swapped jackets with each other before going on.