有关英文歌的问题

我是个五音不全的人…而我的GF特别喜欢听英文歌，还有2个月她就要过生日了，我想唱给她JUSTIN BIEBER的FAVORITE GIRL，歌词已经差不多了，就是唱的时候特别难听，怎么改变…请各位高手赐教！

[ti:昨日重现][ar:卡朋特][by:水晶王子]when i was young i'd listen to the radio waiting for my favorite songswhen they played i'd sing along,it make me smile.those were such happy times and not so long agohow i wondered where they'd gone.but they're back again just like a long lost friendall the songs i love so well.every shalala every wo'wostill shines.every shing-a-ling-a-ling that they're starting to singso finewhen they get to the partwhere he's breaking her heartit can really make me cryjust like before.it's yesterday once more.(shoobie do lang lang)looking bak on how it was in years gone by and the good times that hadmakes today seem rather sad,so much has changed.it was songs of love that i would sing to themand i'd memorise each word.those old melodies still sound so good to meas they melt the years awayevery shalala every wo'wo still shinesevery shing-a-ling-a-ling that they're startingto sing so fineall my best memorise come back clearly to me some can even make me cryjust like before.it's yesterday once more.(shoobie do lang lang)every shalala every wo'wo still shines.every shing-a-ling-a-ling that they're starting to singso fineevery shalala every wo'wo still shines.every shing-a-ling-a-ling that they're starting to singso fine http: lrc.bzmtv.com[ti:say you say me][ar:lionel richie][al:dancing on the ceiling][by:我爱歌词网-- http: www.feiyes.net]say you say melionel richiesay you, say mesay it for alwaysthat's the way it should besay you, say mesay it together, naturallyi had a dream, i had an awesome dreampeople in the park playing game in the darkand what they played was a masqueradebut from behind the walls of doubta voice was crying outsay you, say mesay it for always that's the way it should besay you, say mesay it together, naturallyas we go down life's lonesome highw