I think The Weeknd did a great job collaborating with Lana Del Rey in Lust For Life. This is great song, and The Weeknd just made it better with his unique addition and style in the song. Lust For Life is a totally new sound. It sounds like a pop song at times, but also has hints of other genres and influences from a variety of artists.
I think the blend of Lana Del Rey and The Weeknd give Lust For Life the airy and emotional sound that the song lyrics need.