I’m a pretty good singer, but I’ve been trying to sing "100 Years" by five for fighting, but I just can’t get that high, my voice keeps cracking (I’m a guy). But I’m really determined to get it, is there anything I can practice? Thanks in advance!
First of all, I would suggest looking into taking voice lessons from a qualified, experienced voice teacher. Extending range is tricky, and if not done correctly, will permanently damage your voice. If you notice, Five for Fighting sings most of that song with falsetto. So if you need help with that, take a hint from High School Musical. Sharpay’s little exercise when she vocalizes really, really high and moves her fingers down her face (that last part is optional) really helps develop falsetto. Try these things, and good luck!
Ian