As you are learning Chinese and want to improve it, I think it is better to tell you some pop music in Chinese, such as “爱的人”（ai de ren）and “感动”（gan dong）.I hope you'll like it.

why you want to listen chinese music

梁静茹（暖暖）；周杰伦（乱舞春秋、止战之殇）；汪峰（勇敢的心）；崔健（一无所有）；徐小凤（顺流逆流）；蔡国权（不装饰你的梦）；陈明（快乐老家）；陈淑桦（笑红尘）；动力火车（背判情歌）；迪克牛仔（爱无罪）；樊桐舟（男人的好）；范玮琪（最初的梦想）；高胜美（追梦人）；周华健（难念的经）；李丽芬（爱不释手）；黄凯芹（晚秋）；黑豹（无地自容）；屠洪刚（你）；谭咏麟（讲不出再见）；老狼（情人劫）；姜育恒（驿动的心）；林子祥（人海中一个你）；梅艳芳（我看着寂寞长大）；张克帆（绝世）；张国荣（倩女幽魂）；韩磊（心灵睡过的地方）；金海心（把耳朵叫醒）；毛阿敏（相思）；腾格尔（天堂）；田震（干杯，朋友）；孙楠（留什么给你）；那英（愿赌服输）；张信哲（说谎）；张学友（明日世界终结时）；李玖哲（想太多）；黎明（全日爱）；裘海正（天也不懂情）；赵薇（发现）；郑绪岚 (枉凝眉) ； 袁凤瑛（天若有情）；郑少秋（笑看风云）；张雨生（大海）

It depends on your preference (taste)--is there a specific genera you're looking at? Although I'm not really a pop fan myself, there're some good songs here and there (from time to time).

I like going on douban.fm and switching it to the 华语 channel. It is definitely full of pop music in Chinese.