she is singing to the old people .这里sing to 怎么翻译?

she is singing to the old people .她给老人们唱歌.
sing to 由 ...伴奏着唱,和着 ...唱
例句：
1.
He sang to a piano accompaniment.
他演唱由钢琴伴奏.
2.
The little girl likes to sing to many people.
这个小姑娘喜欢唱给许多人听.
3.
"Now," said the compere,"this little girl has traveled all the way from Liverpool to sing to us tonight.So let's all give her a big hand."
节目主持人说："今天晚上,这个从利物浦远道而来的小姑娘将为我们演唱,让我们热烈鼓掌欢迎她."
再问： he often sings me songs by internet.又怎么解释，sing 也是及物动词，可以这么用吧？这个翻译为他经常上网时唱歌给我听。？
再答： he often sings me songs by internet.他常常唱我的歌曲通过互联网。