Who gets top billing when two artists collaborate on a song?

Answer 1

The artist who gets top billing on a collaboration sing is usually the one who contributes more in some way. This contribution could be in the form of the artist who also wrote or produced the song.

Answer 2

Typically, the artist whose name is listed first on the song credits or promotional material receives top billing when two artists collaborate on a song. This is often negotiated between the artists and their respective teams prior to the release of the song.