Zodiac Girls: Dancing Queen by Cathy Hopkins
This time it's an Aries!
Marsha is an outgoing popular drama queen who lands her dream part in the school play, but injures herself just before curtain up. When she has to spend three nights in hospital, she is furious, until she realises not everyone is as lucky as her. She decides to use her Aries leadership skills to raise a million pounds to build a recreational wing for the hospital - but how?