My favorite singer.

Taylor Swift is one of my favorite singers in America. I become happy {and pleasant がいりません。} when I hear her voice.
She has not only a nice voice but also a great technique of guitar.

「a great technique of guitar」はちょっとおかしいです。 "Plays the guitar well." それとも、I also love how she plays the guitarと言えます。

私もTaylor Swiftが好きですよ。でも、American Country musicが大好きです。Tim McGraw, Darius Rucker, Sugarland, etc... いろいろな音楽が好きですけど、Countryが一番好きですよ。日本の音楽もとても大好きです。Beni, Monkey Majik, Kana Nishino, Bennie K, Megaryu, etc... Anime music, too. ^^

てつだいましたか。もっと日本語を書かなくて、すみませんでした。もうならっています。

My favorite singer.

Taylor Swift is one of my favorite singer in America. She has a nice voice.

So, I become happy when hear her voice.

I also like how she plays the guiter.

I want to go to her concert.   

My favorite singer.

Taylor Swift is one of my favorite singer in America. I become happy and pleasant　when I hear her voice. She has not only a nice voice but also a great technique of guitar.