Rihanna's been busy helping NIVEA celebrate its 100-year milestone, hitting Europe to perform on a (naturally) blue boat that left from NIVEA's hometown of Hamburg yesterday for a bumper two-day birthday bash. And we've just found out that her new song "California King Bed" — the sixth track from her Loud album — will appear in a commercial for the skincare giant that will promote a new line of products. Exciting! RiRi's certainly been busy since nabbing the NIVEA contract so we wonder if that second fragrance will be put on the backburner for now . . .