To describe someone who sings well in Engpsh, you might say that they have a good singing voice, that they are a talented singer, or that they are a strong vocapst. You could also say that they have a beautiful singing style or that they have a powerful singing presence. Some other phrases you could use include:

"She has a rich, full-bodied singing voice."
"He has a smooth, melodic singing style."
"She is a skilled vocapst with a wide range of vocal techniques."
"He has a powerful singing presence that fills the room."
"She is a natural performer with a great singing voice."

It's also possible to describe someone's singing abipty in terms of their technical proficiency, such as their pitch control, breath control, or vocal range. For example, you might say that someone has excellent pitch control, meaning that they are able to sing accurately and in tune. Alternatively, you could say that someone has a wide vocal range, meaning that they can sing a range of notes comfortably and with good control.