I want to sing but i can't?

I'm 17 and ever since i was a little kid i wanted to be the lead singer in a band. I can't sing. I can't sing the right tune. The only song that i can sing to the correct tune is tell me something i don't know, by selena gomez. I can't afford signing lessons. I sound really bad when i sing.... show more I'm 17 and ever since i was a little kid i wanted to be the lead singer in a band. I can't sing. I can't sing the right tune. The only song that i can sing to the correct tune is tell me something i don't know, by selena gomez. I can't afford signing lessons. I sound really bad when i sing. I'm practicing. I think i'm tone deaf. Will playing an instrument help me? I'm getting a guitar for christmas. I have one but its broken, i broke it a week after i got it. The guy said its not worth it to fix it.
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