Alicia Keys and Beyonce Knowles have a song together. The chorus introduces the premise of the piece. The verse is delivered by Alicia's confident/brassy tone. Beyonce follows up with her siren like prescence, which melodically mirrors that of Madame Keys. Alicia's vocal endurance holds up as the two soloist perform. The lyrics are typical of pop r&b, with statements like:"how to be with me".
Yes, the collaboration sounds like a trial run of something greater, but once you get through the bridge you find that the song is over, only leaving you with wanting more. The piece dances and is backed by a solid chord progression, constructed my Ms. Key's (I'm sure). Nice work lady's.