How can I lose weight in time for my audition?

I am a size 9, and for this particular audition, it would greatly benefit me if I was a size 3.

I am 21, so I feel like by the time I lose weight I’ll be too old to audition. Time is critical for me right now. The audition is 4 months away.

ever heard of the abc diet? it works for quick, but short term, weight loss.
Here’s the plan, don’t go over the amount of calories per each day
day1: 500 calories(or less )
day2: 500 calories(or less)
3:300 calories
4:400 calories
5: 100 calories
6: 200 calories
7: 300 calories
8: 400 calories
9: 500 calories
10: fast
11: 150 calories
12: 200 calories
13: 400 calories
14: 350 calories
15: 250 calories
16: 200 calories
17: fast
18: 200 calories
19: 100 calories
20: fast
21: 300 calories
22: 250 calories
23: 200 calories
24: 150 calories
25: 100 calories
26: 50 calories
27: 100 calories
28: 200 calories
29: 200 calories
30: 300 calories
31: 800
32: fast
33: 250 calories
34: 350 calories
35: 450 calories
36: fast
37: 500 calories
38: 450 calories
39: 400 calories
40: 350 calories
41: 300 calories
42: 250 calories
43: 200 calories
44: 200 calories
45: 250 calories
46: 200 calories
47: 300 calories
48: 200 calories
49: 150 calories
50: fast

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