I have problem whenever i am singing and need singing tips, help me?

Why are you holding your breath? Are you nervous? Is it just a lousy habit from always doing it that way? Is it because you don't know when to take breaths and so you keep it like a "reserve"? Figuring out why might help... Aside from that, like any bad habit, you need lots of repetition to get rid of it. You should dedicate some practice time to just paying attention to when you're holding your breath, and stop doing it whenever you realize. If you don't know when you're doing it, you can get a friend who can signal you when you do it. After some time singing, breathing should come somewhat naturally in most cases. Since you're used to holding your breath, you might need to consciously go through the song, line by line, phrase by phrase, and figure out when you want to breathe in. Write it down if you need to. For each line, sing it, and make sure you have the air for it. After singing a line, breathe out and then back in for the next line. It might help if you breathe on rhythm. When you're about to sing a line, you might breathe in on beat 3 or 4 of the music before that line. I find this also helps with timing when you start singing a line. Be prepared for the times you know you need to breathe in - and breathe OUT before breathing in! I know when I sing, a lot of times I'll have more air for a line in the song than I need, so when it ends I breathe out all the extra air and then breathe in deeply again. It helps keep that feeling of rhythm going.