Parties! The style, stars and scoop from Hollywood's hottest events

Before catching a flight to Los Angeles for the Grammys, Rihanna took the stage to perform her hits, "Umbrella" and "Don't Stop the Music." The multi-tasking singer—who spent the early part of the week hitting the front rows at fashion week and unveiling her new line of umbrellas for Totes—overcame her nerves to perform for the A-list crowd and help express the urgent need to support Raise Malawi and UNICEF's efforts to feed, educate and vaccinate the world’s children against deadly preventable diseases.