给定一首歌曲，编辑一篇介绍这首歌的文章。文章应包含艺术家的背景、歌曲的主题及其音乐特点等。

"Hello" by Adele
"Hello" is a song by acclaimed British singer Adele. It was released in 2015 as the lead single from her album "25". The song is about nostalgia, regret, and longing for a past romance.

Musically, "Hello" is characterized by its melancholic piano melody and Adele's powerful vocals. The song builds gradually throughout, with a soaring chorus that showcases Adele's impressive vocal range. The production is simple yet effective, with a focus on Adele's emotive performance.

Adele's career has been defined by her soulful, introspective songs and her powerful voice. She has won numerous awards, including multiple Grammy Awards, and is one of the most successful artists of her generation. "Hello" is a standout track in her catalog, and a modern classic in the world of pop music.