Tributes of love and respect came from many celebrities following Thursday's death of Aretha Franklin. Longtime friend Clive Davis tweeted, "I’m absolutely devastated by Aretha’s passing. She was truly one of a kind. She was more than the Queen of Soul. She was a national treasure to be cherished by every generation throughout the world. Apart from our long professional relationship, Aretha was my friend. Her loss is deeply profound and my heart is full of sadness. John Legend tweeted, "Salute to the Queen. The greatest vocalist I've ever known." Billy Joel tweeted, "We have lost the greatest singer of our time. As a songwriter, I know personally how meaningful a gifted interpreter of material can be. No one can replace her." Barbra Streisand tweeted, "It’s difficult to conceive of a world without her. Not only was she a uniquely brilliant singer,but her commitment to civil rights made an indelible impact on the world." Anita Baker simply tweeted, "Queen, my queen." Elton John commented, "The loss of Aretha Franklin is a blow for everybody who loves real music: Music from the heart, the soul and the Church. Her voice was unique, her piano playing underrated – she was one of my favorite pianists." Many other tributes continue to roll in for the Queen of Soul.