Luciana Karina Santos de Lima better known by her stage name Luka (born in Porto Alegre, Brazil on 26 June 1979) is a Brazilian singer and songwriter. She has released 4 studio albums.

She started singing and playing guitar at 16 when she was known as Luciana Lima, performed in venues in Rio Grande do Sul. She also appeared in music festivals such as Planeta Atlântica. Besides guitar, she learned piano, music theory and joined a choir called Arapy when she lived in Paraguay for 2 years.