Great reply, @voodoo!
We all want Ken to explain to us exactly how to sing every one of our favorite singers, note-by-note, word-by-word.... but there aren't enough hours in the day or dollars in the U.S. Treasury to pay for the studio time to sing and instruct on every single person's most favorite singers....
That said, if you have lessons with Ken, and ask for help on any given song, he is more than willing to take the time with you and show you how to do it, and how to do it safely.
I dare say that Ken has more demos of more artists' styles that ANY other vocal coach anywhere. He more than demonstrates the versatility of using his vocal methods on a variety of vocal styles.
Learn to sing properly using Ken's teachings, and then go on about your business, singing any genre by any artist and applying the universal principles taught in KTVA to all of your singing in the style of your choice.
Good Singing to You, @GeorgeM!