Artist names and their changes:

[CRAZY-HORSE]

ive copied and pasted your list bob_32,
my new guesses are in bold type:

1. The Blue Velvets
- Clue: also known as The Golliwogs

2. The Pendletones
- Ans: The Beach Boys

3. Farm
- Clue: Iconic Australian band little river band

4. Tom & Jerry
- Ans: Simon & Garfunkel

5. Crush
- Clue: Australian, from around the turn of the millennium savage garden (but they were late 90s from memory)

6. The Four Lovers
- Clue: The Four... (something else)

7. The Four Aims
- Clue: The Four... (something else) four tops

8. The Mullanes
- Ans: Crowded House

9. Flowers (not to be confused with Kara's Flowers)
- Ans: Icehouse

10. The Teenagers (There have been a number of groups with this name, but these guys became far better known under a moniker they adopted later)
- Clue: Under their charismatic lead singer, they became identified with a whole musical genre, bringing that genre to a world wide audience. queen


BTW, my answers are pure guesses, I do not "google", that is cheating