How to you tell your girlffriend to lose some weight?

Laura asks…i wanna lose weight , help =]?alright i want alot of people to help me out! trainers or just normal smart people ;] hehe. okay im 15, 5'5, and 140 pounds i guess some people say thats not bad but it kinda is i keep hearing like older woman complaining about being like 140 pounds and they looked better then me! okay well here i get to my problem i thought i looked good except for my stomach but can someone give me a day to day workout for what i should excercise / eat ; i wanna

lose some weight