LOS ANGELES (Reuters) – Whitney Houston was given a final sendoff by the Grammys on Thursday as Halle Berry, Britney Spears, Jennifer Hudson, Usher and other stars shared their memories and performed in homage to the late singer. Academy-award winner Berry made a tearful introduction at the "We Will Always Love You: A Grammy Salute to Whitney Houston" special, and praised the "unforgettable" performer. "She inspired a generation of little girls and women to believe in their own dream and to know that they had within themselves the greatest gift of all. …