"Wonderful Tonight" by singer-songwriter Eric Clapton, is from his 1977 album Slowhand. Clapton wrote the song about Pattie Boyd. The female vocal harmonies on the song are provided by Marcella Detroit (then Marcy Levy) and Yvonne Elliman.
https://en.wikipedia.org/wiki/Wonderful_Tonight
https://en.wikipedia.org/wiki/Slowhand
https://en.wikipedia.org/wiki/Eric_Clapton
https://en.wikipedia.org/wiki/Wonderful_Tonight
https://en.wikipedia.org/wiki/Slowhand
https://en.wikipedia.org/wiki/Eric_Clapton