I think this is a good idea. Two musical stars from different generaations combining to raise money for Harvey relief.
A good way to make money is if Beyoncé sings a Streisand song and vice versa. I would love to see Beyonce sing People. I am not that familar with Beyonce’s catalog of music to say which one Streisand should sing. Then sell the songs as a cd single like what Elton John did with Candle In The Wind after Princess Diana was killed. I still have that single somewhere. They can also sell it as a downloadable.