Does anyone know how i can sing higher like mariah carey or just a little high please help!?

squeeze ur nuts with a pair of plyers..that should do it....lol

take a deep breath into your stomach and drink lots of water

Well, Mariah Carey has a very spectacular vocal range, and the likely hood is that, many of us will never receive as broad a range. But that doesn't mean you shouldn't try! I have learned from music majors, and from my own experience that your range broadens when you practice. So, if you want to sing high, sing high - and you may get better.
Best of luck!

when u sing aim the sound towards the roof of your mouth it will come out higher and louder

tuck in your stomach. that oughta help a little. sing towards the top of your mouth. also, if you really want to get better, you should just try a little higher note each day. you should get used to it cuz if you try to sing too high, your voice will come out squeaky and cracked.

also use ur lower diaphragm....not alot of ppl use their pelvic diap. jus the one under their ribs...if u bring air in and center it around ur lower diaph. u can hold a note longer higher and a bit more powerful....basically feel da pressure above ur genital area and below ur belly button....this actually worksz.....no bullshyt