I read this series CHEERLEADERS as a teenager and I remember loving the characters and their story lines. All different authors. I have books 1-3, 5-8, 25 & 29. No idea what happened to the others but I know I had more than these.
Blurb from back of book 1:
To all of them, being a cheerleader means being the most popular, the most desirable, the most envied...and even the most hated. They will be stars, dazzling and exciting. Mary Ellen, Pres, Nancy, Olivia, Walt, Vanessa, Susan...and fifty others...are trying out, trying to make their wildest dreams come true.