Im a Newy - Need some motivation!

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Hi Im 20 and new to this fitness pal. I weigh 9 stone 13 (5ft 7) i know thats not huagee but really want to fit in with the 6 girls im going on holiday with in July for my 21st birthday i.e 8 stone 7! Any meal plans, exercise plans that you would reccomend id be greatful of! I dont want to lose it all in a week im happy to lose it healthily but need motivation! Any similar stories? :smile: